7. Ken is thinking a special type of password which consists of four different numbers using digits O up to 9, where each digit will be used only once. How many different passwords are there? * O A. 151,200 B. 5,040 О с. 3,024 D. 210

Q: How many different passwords of 4 characters can be made using the numbers from 0 to 9 and the…

A: A password of four characters is to be made using the numbers from 0 to 9 i.e. 10 digits and the…

Q: 1 1 + 2 2 (4 3 12/

A: Consider the provided expression, We have to simplify the given expression.

Q: How many 4-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, if repetition of digits…

A: In this question, concept of combination is applied. Combination A combination is a mathematical…

Q: 7. You need to select a three-character password for a new online bank account. The rules are: you…

A: Permutation - The different arrangements of a given number of things by taking some or all at a…

Q: Three-digit numbers are formed from the digits 0,1,6,7,8 and 9 if no repitition is allowed d. how…

A: The given digits are 0, 1, 6, 7, 8, and 9.

Q: n consists of 10 albums, each containing 42 pages. How many stamps are in the total collection if 40…

A: Introduction: Different symbols are used in mathematics. One of the most common math symbols is the…

Q: 2. In how many numbers with seven distinct digits do only the digits 1-9 appear?

A:

Q: How many can four digits be formed using the digits 0, 1, 2, and 3 (repetition is allowed)? * O 12 O…

A:

Q: How many three-letter "words" can be made from 5 letters "FGHIJ" if repetition of letters (a) is…

A: Given5 letters is "FGHIJ"No.of letters = 5

Q: 21. Bank checks. Determine the check digits for the following bank codes: 0 25 7 1 1 0 8 .

A: The given code is: 0 2 5 7 1 1 0 8 _

Q: 3. My parents just started their digital music collection. If they have put cd's by 4 different…

A: 3) Given, Parents have put cd's by 4 different groups on their mp3 player. We have to find how many…

Q: To enter their home the rouse family enters a 6 character code consisting of 4 letters (uppercase of…

A: We have to find 6 character code consisting of 4 letters (uppercase of lowercase) and 2 digits if…

Q: How many ways to arrange 5 books on the shelf exist if two definite books are not placed together.

A:

Q: How many 3-digit numbers can be formed from the digits 2, 3, 4, 6, 7 without repetitions? b. How…

A: The 3-digit numbers that can be formed from the digits 2, 3, 4, 6, 7 without repetitions are: 234,…

Q: In how many ways can 5 man draw water from 5 taps if no tap can be used more than once? * O 720 О…

A: Introduction: There are 5 men, who draw water from 5 available taps.

Q: How many ways ways can you arrange the letters in the word math? O 24 O 12 48 O 36

A:

Q: Let's say that a computer can check 175 million passwords per second. 1.  How long (in hours) would…

A: GivenComputer can check 175 million passwords per second Total number of alphabets (lower case) =…

Q: How many different numbers with nonrepeating digits from 4000 to 6000 can be produced using the…

A: The problem can be solved using the concept of permutation and combination.

Q: A 4-Letter code to be formed using all the letters of the word HISTORY How many of these different…

A: No.of letters in the word " HISTORY " is 7

Q: A four-digit number is to be formed from the digits 0, 1, 2, 3, 5, 7, 8, and 9. How many four-digit…

A: Given,digits is 0,1,2,3,5,7,8,9

Q: Before 1995, area codes for phone numbers had the following format: NNN, where first digit couldn’t…

A: Given that , Before 1995, area codes for phone numbers had the following format: NNN where (1) first…

Q: How many posible 5-digit zip codes exist if the first number must be from 3 and 9, the last number…

A: We have given that 5-digit zip codes exist if the first number must be from 3 and 9, the last number…

Q: How many ways to arrange 7 books on the shelf exist if two definite books are not placed together?

A:

Q: What does the digit 5 mean in the number 6,924,576

A:

Q: How many different 3-digit numbers are possible using only the digits 2,3,5,6 ?

A:

Q: 23 Find the number of permutations of all the letters of the word NOTEPAD if: a) the letters can be…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Findd the Londimantd metrix and generedsolution o rAYWhere 3-24 -70 2 2.

A:

Q: A password consists of 8 to 12 characters. It must have at least one uppercase letter and one number…

A: Answer is 535886256970012000.   Detailed solution is attached below.

Q: How many different 10-letter codes can be made using three a’s, four b’s, and three  c’s?

A:

Q: Without using a calculator, test for 60,330 for divisibility by 2, 3, 4, 5, 6, 8, 9, 10, and 11 Is…

A:

Q: How many different numbers can be formed using all the digits of 3 334 777?

A: