If any seven digits could be used to form a telephone number, how many seven digit telephone numbers would not have any repeated digits? B)How many seven-digit telephone numbers would have at least one repeated digit?

Q: The local​ seven-digit telephone numbers in city A have 157 as the first three digits. How many…

A: The objective of the question is to find out the total number of different seven-digit telephone…

Q: The seven given numbers are: 5, 6, 3, 4, 1, 2, and 7. A. How many five-digit numbers can be formed…

A: Given seven numbers are5,6,3,4,1,2,7

Q: f 10 friends are going to occupy 10 seats in shuttle on the way to the airport, how many different…

A: Given  n = 10  x =10  P[10,10] is:

Q: How many 7 digit phone number are possible? Assume the first digit can be zero and all digits can be…

A: make 7 digit phone number.The first number can be zero and all digits can repeated. The digits are :…

Q: The local​ seven-digit telephone numbers in city A have 334 as the first three digits. How many…

A:

Q: How many dozen doughnuts must be ordered for a meeting if 156 people are expected to attend, and…

A: To determine how many dozen doughnuts must be ordered for a meeting if156 people are expected to…

Q: From the digits 1, 2, 3, 4, 5, 6, 7, 8, and 9, how many three-digit numbers greater than 400 can be…

A: digits : {1,2,3,4,5,6,7,8,9}  select 3 digits to make 3 digit number.  find no. of ways to make…

Q: Khristelle was able to calculate the total number of 3-digit numbers that can be formed from a given…

A:

Q: Arealtor uses a lock box to store the keys to a house that is for sale. The access code for the lock…

A: The access code contains 4 digits          Digits : 0,1,2,3,4,5,6,7,8,9 The first digit can…

Q: How many 4-digit numbers are there?   And if repetition of digits is not allowed?

A: Given that n= number from 1 to 9 = 9 r = 4 ( since we have to take 4 digit number)

Q: How many different license plates can be made by using two letters followed by three digits selected…

A: The licensing plate should contain 5 places in which first 2 positions filled with letters and next…

Q: A four digit numbers can formed using only the digits 1, 2, 3, 4, 5, 6 (no repeated digits), How…

A: Consider a problem in which there are n vacant inline spots, each of the spots are to be filled by…

Q: How many different seven-digit telephone numbers can be formed if the first digit cannot be zero?

A:

Q: How many numbers between 1 and 1000 are divisible by 12 or 15, or both 12 and 15?

A: We need to find how many numbers between 1 and 1000 are divisible by 12 or 15, or both 12 and 15. To…

Q: How many six digit numbers can be formed with no repetitions?

A: We can use all the 6 digits without repetition A 6 digit number cannot have  0 in the first place.…

Q: How many license plates can be made using either two or three letters followed by either two or…

A:

Q: How many ten-digit telephone numbers are possible if the first three digits must all be different?

A: Given,total no.of digits=10  (0 to 9)

Q: How many seven-digit phone numbers can begin with the prefix 827?

A: The seven digit phone numbers can be made by filling the blank spaces in 827_ _ _ _ .We can fill…

Q: From the digits 0, 1, 2, 3, 4, and 5, how many 3-digit numbers can be formed if digits may be…

A:

Q: Given 9 digits,   1,23,4,5,6,7,8,9, how many 3-digit numbers could be formed without repetition of…

A: Given ,total no.of digits=9 (1 to 9)

Q: How many numbers between 50 and 600, 000, including endpoints, are divisible by 2 or 5?

A: We have to find how many numbers between 50 and 600000, including endpoints, are divisible by 2 or…

Q: How many five-digit telephone numbers with pairwise distinct digits can be formed ?

A: It is required to construct a five-digit telephone number with pairwise distinct digits. The…

Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.