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If ^n+2C8:^(n-2)P4: 57 : 16 , find ndot...

If `^n+2C_8:^(n-2)P_4: 57 : 16 ,` find `ndot`

A

20

B

19

C

18

D

17

Text Solution

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Exercise
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