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The number of different seven digit numb...

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

A

`7P_2cdot 2^5`

B

`^7C_2 cdot 2^5`

C

`^7C_2 cdot 5^2`

D

None of these

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The correct Answer is:
B
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