In the United States, telephone numbers consist of a three-digit area code followed by a seven-digit local number. Suppose neither the first digit of an area code nor the first digit of a local number can be a zero but that all other choices are acceptable. How many different area codes are possible?

Q: A four-digit house number contains no zeros. The number has exactly three distinct digits. How many…

A: It is given that a four digit house number has no digits. The number has exactly 3 distinct digits.…

Q: The probability that the oldest is a boy and the youngest is a girl, given that there is at least…

A: Here  Family has 3 children with at least one boy and one girl.

Q: Fifty (50) students in a school played Basketball and Football. Every student plays at least one of…

A:

Q: dical research has shown that repeated wrist extensions beyond 20 degrees increase the risk of wrist…

A: Given Each of the 24 Student's Wrist Extensions:- Data Points(x)  27 27 23 26 27 25…

Q: A telephone number consists of 10 digits: 3 digit area code followed by 7 digit number. How many…

A: For area code , possible first digits are 1 to 9 and for the other number ,remaining digits are 0-9…

Q: How many telephone numbers have no repeated digits?

A: Given, A telephone number consists of seven digits which is combination of {0,1,2,3,4,5,6,7,8,9}.

Q: A survey of 100 people showed that 24 own a car, 59 own a bicycle, and 17 own both a car and a…

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: Suppose that I want to purchase a tablet computer . I can choose either a large or small screen ; a…

A: We have to find correct answer..

Q: The three-digit number is given. The sum of all different three-digit numbers with the same digits…

A: A three digit number is given. We have to find possible count of three digit numbers such that the…

Q: A seven chats he insurance account number must be five letters of the alphabet followed by a…

A:

Q: Suppose a license plate contains two letters followed by three distinct digits with the first digit…

A: Ans#- Given, A license plate contains two letters followed by three distinct digits with the first…

Q: Phyllis teaches marketing at a local college. She wants to select one freshman and one sophomore to…

A: It is given that  Freshman = 10  Sophomores = 15

Q: In how many ways can 10 people be seated in a row of 10 chairs if Janet insists on sitting in the…

A: The main objective is to find the permutations for the given problems.

Q: Radio stations that are on the eastside of a nation have call letters consisting of a W followed by…

A: Here we have to number of five letter call letters starting from W

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

A: Given Lock box consist of no.of digits=6Total no.of digits =10                   (i.e.,…

Q: A survey of 100 people showed that 25 own a car, 58 own a bicycle, and 17 own both a car and a…

A: Solution-: We have Number of people showed that own a car =25               Number of people showed…

Q: How many different codes are​ available?

A: It is given that the code consists of four digits. The first digit cannot be zero and the last digit…

Q: A license plate is to consist of two letters followed by four digits. Find the number of license…

A: Given,no.of letters=26 (A to Z)no.of digits=10 (0 to 9)

Q: A certain state previously had license plates containing two letters followed by four digits but now…

A: It is given that in a certain state previously had license plates containing two letters followed by…