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S1 ,S2 ,. . . S(10) are the speakers ...

`S_1 ,S_2 ,. . . S_(10)` are the speakers in a conference if `S_1 ` addresses of ways in which a specified speaker is to speak before another specified speaker is

A

10!

B

9!

C

`10xx8 !`

D

`(10!)//2`

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