The number of 5 digit telephone numbers ...

The number of 5 digit telephone numbers having at least one of their digits repeated is

A

A.90000

B

B.100000

C

C.30240

D

D.69760

Verified by Experts

The correct Answer is:

2

Similar Questions

Explore conceptually related problems

Find the number of 5-digit telephone numbers having at least one of their digits repeated.

How many six-digit telephone nunmbers can be formed if the first two digits are 45 and no digit can appear more than once?

The number of 3 digit odd numbers, that can be formed by using the digits 1, 2, 3, 4, 5, 6 when the repetition is allowed, is

How many 5 digit telephone numbers can be constructed using the digits 0 to 9, if each number starts with 67 and no digit appears more than once?

The number of all four digit numbers with distinct digits is

The number of different four digit numbers that can be formed with the digits 2, 3, 4, 7 and using each digit only once is

The number of 7 digit numbers which can be formed using the digits 1, 2, 3, 2, 3, 3, 4 is

Find the number of 4-digit numbers that can be formed using the digits 1, 2, 4, 5, 6, 8 if (a) digits can be repeated (b) digits cannot be repeated