Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN: 9780547587776
Author: HOLT MCDOUGAL
Publisher: HOLT MCDOUGAL
bartleby

Concept explainers

Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba…
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
bartleby

Videos

Question
Book Icon
Chapter 12, Problem 6CP
To determine

The number of combinations possible.

Expert Solution & Answer
Check Mark

Answer to Problem 6CP

The number of combinations possibleis 7.

Explanation of Solution

Given:

The bakery sells 10 different kinds of pastry.

Since,

The bakery sells 10 different kinds of pastry

And

You want to buy 6 different kinds of pastry

Therefore,

Number of combinations available is 10C6 .

  ⇒10C6=7

Hence, the number of combinations possible is 7.

Previous
Chapter 12, Problem 5CP
Next
Chapter 12, Problem 7CP

Chapter 12 Solutions

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

Ch. 12.1 - Prob. 1CCh. 12.1 - Prob. 2CCh. 12.1 - Prob. 3CCh. 12.1 - Prob. 4CCh. 12.1 - Prob. 5CCh. 12.1 - Prob. 6CCh. 12.1 - Prob. 1ECh. 12.1 - Prob. 2ECh. 12.1 - Prob. 3ECh. 12.1 - Prob. 4E
Ch. 12.1 - Prob. 5ECh. 12.1 - Prob. 6ECh. 12.1 - Prob. 7ECh. 12.1 - Prob. 8ECh. 12.1 - Prob. 9ECh. 12.1 - Prob. 10ECh. 12.1 - Prob. 11ECh. 12.1 - Prob. 12ECh. 12.1 - Prob. 13ECh. 12.1 - Prob. 14ECh. 12.1 - Prob. 15ECh. 12.1 - Prob. 16ECh. 12.1 - Prob. 17ECh. 12.1 - Prob. 18ECh. 12.1 - Prob. 19ECh. 12.1 - Prob. 20ECh. 12.1 - Prob. 21ECh. 12.1 - Prob. 22ECh. 12.1 - Prob. 23ECh. 12.1 - Prob. 24ECh. 12.1 - Prob. 25ECh. 12.1 - Prob. 26ECh. 12.1 - Prob. 27ECh. 12.1 - Prob. 28ECh. 12.1 - Prob. 29ECh. 12.1 - Prob. 30ECh. 12.1 - Prob. 31ECh. 12.1 - Prob. 32ECh. 12.1 - Prob. 33ECh. 12.1 - Prob. 34ECh. 12.1 - Prob. 35ECh. 12.1 - Prob. 36ECh. 12.1 - Prob. 37ECh. 12.1 - Prob. 38ECh. 12.1 - Prob. 39ECh. 12.1 - Prob. 40ECh. 12.1 - Prob. 41ECh. 12.1 - Prob. 42ECh. 12.1 - Prob. 43ECh. 12.1 - Prob. 44ECh. 12.1 - Prob. 45ECh. 12.1 - Prob. 46ECh. 12.2 - Prob. 1CCh. 12.2 - Prob. 2CCh. 12.2 - Prob. 3CCh. 12.2 - Prob. 4CCh. 12.2 - Prob. 5CCh. 12.2 - Prob. 6CCh. 12.2 - Prob. 1ECh. 12.2 - Prob. 2ECh. 12.2 - Prob. 3ECh. 12.2 - Prob. 4ECh. 12.2 - Prob. 5ECh. 12.2 - Prob. 6ECh. 12.2 - Prob. 7ECh. 12.2 - Prob. 8ECh. 12.2 - Prob. 9ECh. 12.2 - Prob. 10ECh. 12.2 - Prob. 11ECh. 12.2 - Prob. 12ECh. 12.2 - Prob. 13ECh. 12.2 - Prob. 14ECh. 12.2 - Prob. 15ECh. 12.2 - Prob. 16ECh. 12.2 - Prob. 17ECh. 12.2 - Prob. 18ECh. 12.2 - Prob. 19ECh. 12.2 - Prob. 20ECh. 12.2 - Prob. 21ECh. 12.2 - Prob. 22ECh. 12.2 - Prob. 23ECh. 12.2 - Prob. 24ECh. 12.2 - Prob. 25ECh. 12.2 - Prob. 26ECh. 12.2 - Prob. 27ECh. 12.2 - Prob. 28ECh. 12.2 - Prob. 29ECh. 12.2 - Prob. 30ECh. 12.2 - Prob. 31ECh. 12.2 - Prob. 32ECh. 12.2 - Prob. 33ECh. 12.3 - Prob. 1CCh. 12.3 - Prob. 2CCh. 12.3 - Prob. 3CCh. 12.3 - Prob. 4CCh. 12.3 - Prob. 5CCh. 12.3 - Prob. 1ECh. 12.3 - Prob. 2ECh. 12.3 - Prob. 3ECh. 12.3 - Prob. 4ECh. 12.3 - Prob. 5ECh. 12.3 - Prob. 6ECh. 12.3 - Prob. 7ECh. 12.3 - Prob. 8ECh. 12.3 - Prob. 9ECh. 12.3 - Prob. 10ECh. 12.3 - Prob. 11ECh. 12.3 - Prob. 12ECh. 12.3 - Prob. 13ECh. 12.3 - Prob. 14ECh. 12.3 - Prob. 15ECh. 12.3 - Prob. 16ECh. 12.3 - Prob. 17ECh. 12.3 - Prob. 18ECh. 12.3 - Prob. 19ECh. 12.3 - Prob. 20ECh. 12.3 - Prob. 21ECh. 12.3 - Prob. 22ECh. 12.3 - Prob. 23ECh. 12.3 - Prob. 24ECh. 12.3 - Prob. 25ECh. 12.3 - Prob. 26ECh. 12.3 - Prob. 27ECh. 12.3 - Prob. 28ECh. 12.3 - Prob. 29ECh. 12.3 - Prob. 30ECh. 12.3 - Prob. 31ECh. 12.3 - Prob. 32ECh. 12.3 - Prob. 33ECh. 12.3 - Prob. 34ECh. 12.3 - Prob. 35ECh. 12.3 - Prob. 36ECh. 12.3 - Prob. 37ECh. 12.3 - Prob. 38ECh. 12.3 - Prob. 39ECh. 12.3 - Prob. 40ECh. 12.3 - Prob. 41ECh. 12.3 - Prob. 42ECh. 12.3 - Prob. 43ECh. 12.3 - Prob. 44ECh. 12.3 - Prob. 45ECh. 12.3 - Prob. 46ECh. 12.3 - Prob. 47ECh. 12.3 - Prob. 48ECh. 12.3 - Prob. 49ECh. 12.4 - Prob. 1CCh. 12.4 - Prob. 2CCh. 12.4 - Prob. 3CCh. 12.4 - Prob. 4CCh. 12.4 - Prob. 1ECh. 12.4 - Prob. 2ECh. 12.4 - Prob. 3ECh. 12.4 - Prob. 4ECh. 12.4 - Prob. 5ECh. 12.4 - Prob. 6ECh. 12.4 - Prob. 7ECh. 12.4 - Prob. 8ECh. 12.4 - Prob. 9ECh. 12.4 - Prob. 10ECh. 12.4 - Prob. 11ECh. 12.4 - Prob. 12ECh. 12.4 - Prob. 13ECh. 12.4 - Prob. 14ECh. 12.4 - Prob. 15ECh. 12.4 - Prob. 16ECh. 12.4 - Prob. 17ECh. 12.4 - Prob. 18ECh. 12.4 - Prob. 19ECh. 12.4 - Prob. 20ECh. 12.4 - Prob. 21ECh. 12.4 - Prob. 22ECh. 12.4 - Prob. 23ECh. 12.4 - Prob. 24ECh. 12.4 - Prob. 25ECh. 12.4 - Prob. 26ECh. 12.4 - Prob. 27ECh. 12.4 - Prob. 28ECh. 12.4 - Prob. 29ECh. 12.4 - Prob. 30ECh. 12.4 - Prob. 31ECh. 12.4 - Prob. 32ECh. 12.5 - Prob. 1CCh. 12.5 - Prob. 2CCh. 12.5 - Prob. 3CCh. 12.5 - Prob. 4CCh. 12.5 - Prob. 1ECh. 12.5 - Prob. 2ECh. 12.5 - Prob. 3ECh. 12.5 - Prob. 4ECh. 12.5 - Prob. 5ECh. 12.5 - Prob. 6ECh. 12.5 - Prob. 7ECh. 12.5 - Prob. 8ECh. 12.5 - Prob. 9ECh. 12.5 - Prob. 10ECh. 12.5 - Prob. 11ECh. 12.5 - Prob. 12ECh. 12.5 - Prob. 13ECh. 12.5 - Prob. 14ECh. 12.5 - Prob. 15ECh. 12.5 - Prob. 16ECh. 12.5 - Prob. 17ECh. 12.5 - Prob. 18ECh. 12.5 - Prob. 19ECh. 12.5 - Prob. 20ECh. 12.5 - Prob. 21ECh. 12.5 - Prob. 22ECh. 12.5 - Prob. 23ECh. 12.5 - Prob. 24ECh. 12.5 - Prob. 25ECh. 12.5 - Prob. 26ECh. 12.5 - Prob. 27ECh. 12.5 - Prob. 28ECh. 12.5 - Prob. 29ECh. 12.5 - Prob. 30ECh. 12.5 - Prob. 31ECh. 12.5 - Prob. 32ECh. 12.5 - Prob. 33ECh. 12.5 - Prob. 34ECh. 12.5 - Prob. 35ECh. 12.5 - Prob. 36ECh. 12.5 - Prob. 37ECh. 12.6 - Prob. 1CCh. 12.6 - Prob. 2CCh. 12.6 - Prob. 3CCh. 12.6 - Prob. 4CCh. 12.6 - Prob. 1ECh. 12.6 - Prob. 2ECh. 12.6 - Prob. 3ECh. 12.6 - Prob. 4ECh. 12.6 - Prob. 5ECh. 12.6 - Prob. 6ECh. 12.6 - Prob. 7ECh. 12.6 - Prob. 8ECh. 12.6 - Prob. 9ECh. 12.6 - Prob. 10ECh. 12.6 - Prob. 11ECh. 12.6 - Prob. 12ECh. 12.6 - Prob. 13ECh. 12.6 - Prob. 14ECh. 12.6 - Prob. 15ECh. 12.6 - Prob. 16ECh. 12.6 - Prob. 17ECh. 12.6 - Prob. 18ECh. 12.6 - Prob. 19ECh. 12.6 - Prob. 20ECh. 12.6 - Prob. 21ECh. 12.6 - Prob. 22ECh. 12.6 - Prob. 23ECh. 12.6 - Prob. 24ECh. 12.6 - Prob. 25ECh. 12.6 - Prob. 26ECh. 12.6 - Prob. 27ECh. 12.6 - Prob. 28ECh. 12.6 - Prob. 29ECh. 12.6 - Prob. 30ECh. 12.6 - Prob. 31ECh. 12.6 - Prob. 32ECh. 12.7 - Prob. 1CCh. 12.7 - Prob. 2CCh. 12.7 - Prob. 3CCh. 12.7 - Prob. 1ECh. 12.7 - Prob. 2ECh. 12.7 - Prob. 3ECh. 12.7 - Prob. 4ECh. 12.7 - Prob. 5ECh. 12.7 - Prob. 6ECh. 12.7 - Prob. 7ECh. 12.7 - Prob. 8ECh. 12.7 - Prob. 9ECh. 12.7 - Prob. 10ECh. 12.7 - Prob. 11ECh. 12.7 - Prob. 12ECh. 12.7 - Prob. 13ECh. 12.7 - Prob. 14ECh. 12.7 - Prob. 15ECh. 12.7 - Prob. 16ECh. 12.7 - Prob. 17ECh. 12.7 - Prob. 18ECh. 12.7 - Prob. 19ECh. 12.7 - Prob. 20ECh. 12.7 - Prob. 21ECh. 12.7 - Prob. 22ECh. 12.7 - Prob. 23ECh. 12.7 - Prob. 24ECh. 12.7 - Prob. 25ECh. 12.7 - Prob. 26ECh. 12.7 - Prob. 27ECh. 12.7 - Prob. 28ECh. 12 - Prob. 1PSQCh. 12 - Prob. 2PSQCh. 12 - Prob. 3PSQCh. 12 - Prob. 4PSQCh. 12 - Prob. 5PSQCh. 12 - Prob. 6PSQCh. 12 - Prob. 7PSQCh. 12 - Prob. 8PSQCh. 12 - Prob. 9PSQCh. 12 - Prob. 10PSQCh. 12 - Prob. 1MCQCh. 12 - Prob. 2MCQCh. 12 - Prob. 3MCQCh. 12 - Prob. 4MCQCh. 12 - Prob. 5MCQCh. 12 - Prob. 6MCQCh. 12 - Prob. 7MCQCh. 12 - Prob. 8MCQCh. 12 - Prob. 9MCQCh. 12 - Prob. 10MCQCh. 12 - Prob. 11MCQCh. 12 - Prob. 12MCQCh. 12 - Prob. 13MCQCh. 12 - Prob. 14MCQCh. 12 - Prob. 15MCQCh. 12 - Prob. 1CRCh. 12 - Prob. 2CRCh. 12 - Prob. 3CRCh. 12 - Prob. 4CRCh. 12 - Prob. 5CRCh. 12 - Prob. 6CRCh. 12 - Prob. 7CRCh. 12 - Prob. 8CRCh. 12 - Prob. 9CRCh. 12 - Prob. 10CRCh. 12 - Prob. 11CRCh. 12 - Prob. 12CRCh. 12 - Prob. 13CRCh. 12 - Prob. 14CRCh. 12 - Prob. 15CRCh. 12 - Prob. 16CRCh. 12 - Prob. 17CRCh. 12 - Prob. 18CRCh. 12 - Prob. 19CRCh. 12 - Prob. 20CRCh. 12 - Prob. 21CRCh. 12 - Prob. 22CRCh. 12 - Prob. 23CRCh. 12 - Prob. 24CRCh. 12 - Prob. 25CRCh. 12 - Prob. 26CRCh. 12 - Prob. 27CRCh. 12 - Prob. 28CRCh. 12 - Prob. 29CRCh. 12 - Prob. 1CTCh. 12 - Prob. 2CTCh. 12 - Prob. 3CTCh. 12 - Prob. 4CTCh. 12 - Prob. 5CTCh. 12 - Prob. 6CTCh. 12 - Prob. 7CTCh. 12 - Prob. 8CTCh. 12 - Prob. 9CTCh. 12 - Prob. 10CTCh. 12 - Prob. 11CTCh. 12 - Prob. 12CTCh. 12 - Prob. 13CTCh. 12 - Prob. 14CTCh. 12 - Prob. 15CTCh. 12 - Prob. 16CTCh. 12 - Prob. 17CTCh. 12 - Prob. 18CTCh. 12 - Prob. 19CTCh. 12 - Prob. 20CTCh. 12 - Prob. 1CSTCh. 12 - Prob. 2CSTCh. 12 - Prob. 3CSTCh. 12 - Prob. 4CSTCh. 12 - Prob. 5CSTCh. 12 - Prob. 6CSTCh. 12 - Prob. 8CSTCh. 12 - Prob. 9CSTCh. 12 - Prob. 10CSTCh. 12 - Prob. 11CSTCh. 12 - Prob. 1PTTSCh. 12 - Prob. 2PTTSCh. 12 - Prob. 3PTTSCh. 12 - Prob. 4PTTSCh. 12 - Prob. 5PTTSCh. 12 - Prob. 6PTTSCh. 12 - Prob. 7PTTSCh. 12 - Prob. 8PTTSCh. 12 - Prob. 9PTTSCh. 12 - Prob. 10PTTSCh. 12 - Prob. 11PTTSCh. 12 - Prob. 12PTTSCh. 12 - Prob. 13PTTSCh. 12 - Prob. 14PTTSCh. 12 - Prob. 15PTTSCh. 12 - Prob. 16PTTSCh. 12 - Prob. 17PTTSCh. 12 - Prob. 18PTTSCh. 12 - Prob. 19PTTSCh. 12 - Prob. 1CPCh. 12 - Prob. 2CPCh. 12 - Prob. 3CPCh. 12 - Prob. 4CPCh. 12 - Prob. 5CPCh. 12 - Prob. 6CPCh. 12 - Prob. 7CPCh. 12 - Prob. 8CPCh. 12 - Prob. 9CPCh. 12 - Prob. 10CPCh. 12 - Prob. 11CPCh. 12 - Prob. 12CPCh. 12 - Prob. 13CPCh. 12 - Prob. 14CPCh. 12 - Prob. 15CPCh. 12 - Prob. 16CPCh. 12 - Prob. 17CPCh. 12 - Prob. 18CPCh. 12 - Prob. 19CPCh. 12 - Prob. 1CURCh. 12 - Prob. 2CURCh. 12 - Prob. 3CURCh. 12 - Prob. 4CURCh. 12 - Prob. 5CURCh. 12 - Prob. 6CURCh. 12 - Prob. 7CURCh. 12 - Prob. 8CURCh. 12 - Prob. 9CURCh. 12 - Prob. 10CURCh. 12 - Prob. 11CURCh. 12 - Prob. 12CURCh. 12 - Prob. 13CURCh. 12 - Prob. 14CURCh. 12 - Prob. 15CURCh. 12 - Prob. 16CURCh. 12 - Prob. 17CURCh. 12 - Prob. 18CURCh. 12 - Prob. 19CURCh. 12 - Prob. 20CURCh. 12 - Prob. 21CURCh. 12 - Prob. 22CURCh. 12 - Prob. 23CURCh. 12 - Prob. 24CURCh. 12 - Prob. 25CURCh. 12 - Prob. 26CURCh. 12 - Prob. 27CURCh. 12 - Prob. 28CURCh. 12 - Prob. 29CURCh. 12 - Prob. 30CURCh. 12 - Prob. 31CURCh. 12 - Prob. 32CURCh. 12 - Prob. 33CURCh. 12 - Prob. 34CURCh. 12 - Prob. 35CURCh. 12 - Prob. 36CURCh. 12 - Prob. 37CURCh. 12 - Prob. 38CURCh. 12 - Prob. 39CURCh. 12 - Prob. 40CURCh. 12 - Prob. 41CURCh. 12 - Prob. 42CURCh. 12 - Prob. 43CURCh. 12 - Prob. 44CURCh. 12 - Prob. 45CURCh. 12 - Prob. 46CURCh. 12 - Prob. 47CURCh. 12 - Prob. 48CURCh. 12 - Prob. 49CURCh. 12 - Prob. 50CURCh. 12 - Prob. 51CURCh. 12 - Prob. 52CURCh. 12 - Prob. 53CURCh. 12 - Prob. 54CURCh. 12 - Prob. 55CURCh. 12 - Prob. 56CURCh. 12 - Prob. 57CURCh. 12 - Prob. 58CURCh. 12 - Prob. 59CURCh. 12 - Prob. 60CURCh. 12 - Prob. 61CURCh. 12 - Prob. 62CURCh. 12 - Prob. 63CURCh. 12 - Prob. 64CURCh. 12 - Prob. 65CURCh. 12 - Prob. 66CURCh. 12 - Prob. 67CURCh. 12 - Prob. 68CURCh. 12 - Prob. 69CURCh. 12 - Prob. 70CURCh. 12 - Prob. 71CURCh. 12 - Prob. 72CURCh. 12 - Prob. 73CURCh. 12 - Prob. 74CURCh. 12 - Prob. 75CURCh. 12 - Prob. 76CURCh. 12 - Prob. 77CURCh. 12 - Prob. 78CURCh. 12 - Prob. 79CURCh. 12 - Prob. 80CURCh. 12 - Prob. 81CURCh. 12 - Prob. 82CURCh. 12 - Prob. 83CURCh. 12 - Prob. 84CURCh. 12 - Prob. 85CURCh. 12 - Prob. 86CURCh. 12 - Prob. 87CURCh. 12 - Prob. 88CURCh. 12 - Prob. 89CURCh. 12 - Prob. 90CURCh. 12 - Prob. 91CURCh. 12 - Prob. 92CURCh. 12 - Prob. 93CURCh. 12 - Prob. 94CURCh. 12 - Prob. 95CURCh. 12 - Prob. 96CURCh. 12 - Prob. 97CURCh. 12 - Prob. 98CURCh. 12 - Prob. 99CURCh. 12 - Prob. 100CURCh. 12 - Prob. 101CURCh. 12 - Prob. 102CURCh. 12 - Prob. 103CURCh. 12 - Prob. 104CURCh. 12 - Prob. 105CURCh. 12 - Prob. 106CURCh. 12 - Prob. 107CURCh. 12 - Prob. 108CURCh. 12 - Prob. 109CURCh. 12 - Prob. 110CURCh. 12 - Prob. 111CURCh. 12 - Prob. 112CURCh. 12 - Prob. 113CURCh. 12 - Prob. 114CURCh. 12 - Prob. 115CURCh. 12 - Prob. 116CURCh. 12 - Prob. 117CURCh. 12 - Prob. 118CURCh. 12 - Prob. 119CURCh. 12 - Prob. 120CURCh. 12 - Prob. 121CURCh. 12 - Prob. 122CURCh. 12 - Prob. 123CURCh. 12 - Prob. 124CURCh. 12 - Prob. 125CURCh. 12 - Prob. 126CURCh. 12 - Prob. 127CURCh. 12 - Prob. 128CURCh. 12 - Prob. 129CURCh. 12 - Prob. 130CURCh. 12 - Prob. 131CURCh. 12 - Prob. 132CURCh. 12 - Prob. 133CURCh. 12 - Prob. 134CURCh. 12 - Prob. 135CUR

Additional Math Textbook Solutions

Find more solutions based on key concepts
A linear equation is solved by using the intersection of graphs method. Find the solution by interpreting the g...

College Algebra with Modeling & Visualization (5th Edition)

Solve each formula for the given letter . [2.3] What percent of 60 is 42? [2.4]

Elementary and Intermediate Algebra: Concepts and Applications (7th Edition)

Solve each of the following systems. (a) x12x2=53x1+x2=1 (b) 2x1+x2=84x13x2=6 (c) 4x1+3x2=423x1+4x2=3 (d) x1+2x...

Linear Algebra with Applications (9th Edition) (Featured Titles for Linear Algebra (Introductory))

NOTE: Write your answers using interval notation when appropriate. CHECKING ANALYTIC SKILLS Fill in each blank ...

A Graphical Approach to College Algebra (6th Edition)

For each of the matrices A in Exercises 1 through 20, find all (real) eigenvalues. Then find a basis of each ei...

Linear Algebra with Applications (2-Download)

Solve each formula for the given letter . [2.3] What percent of 60 is 42? [2.4]

Elementary and Intermediate Algebra

Knowledge Booster
Background pattern image
Algebra
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, algebra and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Text book image
Algebra and Trigonometry (6th Edition)
Algebra
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:PEARSON
Text book image
Contemporary Abstract Algebra
Algebra
ISBN:9781305657960
Author:Joseph Gallian
Publisher:Cengage Learning
Text book image
Linear Algebra: A Modern Introduction
Algebra
ISBN:9781285463247
Author:David Poole
Publisher:Cengage Learning
Text book image
Algebra And Trigonometry (11th Edition)
Algebra
ISBN:9780135163078
Author:Michael Sullivan
Publisher:PEARSON
Text book image
Introduction to Linear Algebra, Fifth Edition
Algebra
ISBN:9780980232776
Author:Gilbert Strang
Publisher:Wellesley-Cambridge Press
Text book image
College Algebra (Collegiate Math)
Algebra
ISBN:9780077836344
Author:Julie Miller, Donna Gerken
Publisher:McGraw-Hill Education
SEE MORE TEXTBOOKS
Find number of persons in a part with 66 handshakes Combinations; Author: Anil Kumar;https://www.youtube.com/watch?v=33TgLi-wp3E;License: Standard YouTube License, CC-BY
Discrete Math 6.3.1 Permutations and Combinations; Author: Kimberly Brehm;https://www.youtube.com/watch?v=J1m9sB5XZQc;License: Standard YouTube License, CC-BY
How to use permutations and combinations; Author: Mario's Math Tutoring;https://www.youtube.com/watch?v=NEGxh_D7yKU;License: Standard YouTube License, CC-BY
Permutations and Combinations | Counting | Don't Memorise; Author: Don't Memorise;https://www.youtube.com/watch?v=0NAASclUm4k;License: Standard Youtube License
Permutations and Combinations Tutorial; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=XJnIdRXUi7A;License: Standard YouTube License, CC-BY