The number of different seven digit numb...

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

A

`""^7P_2 . 2^5`

B

`""^7C_2 . 2^5`

C

`""^7C_2 . 5^5`

D

none

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The correct Answer is:

B

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