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The number of different seven digit ...

The number of different seven digit number that can be written using only the three digits 1,2, and 3 with the condition that the digit 2 occurs twice in each number is

A

`""^(7)P_(2).2^(5)`

B

`""^(7)C_(2) .2^(5)`

C

`""^(7)C_(2).5^(2)`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1B (COMBINATIONS )
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