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The number of ways in which ten candidat...

The number of ways in which ten candidates `A_(1), A_(2), .. .., A_(10)` can he ranked, if `A_(1)` is always above `A_(2)` is

A

`2 xx 8 !`

B

`9 !`

C

`10 !`

D

`5 xx 9 !`

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The correct Answer is:
D
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