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The number of five digit telephone numbe...

The number of five digit telephone numbers having at least one of their digits repeated is `90000` b. `100000` c. `30240` d. 69760

A

90000

B

10000

C

30240

D

69760

Text Solution

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The correct Answer is:
D
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ML KHANNA-PERMUTATIONS AND COMBINATIONS -SET-3
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  5. A seven digit number made up of all distinct digits 8,7,6,4,2,x and y ...

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  7. The number of ways in which we can select four numbers from 1 to 30 so...

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  10. The sum of the divisors of 2^(5)xx3^(4)xx5^(2), is

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  12. The number of divisors of 441, 1125 and 384 are in

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