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If ""^(18)C(15)+2(""^(18)C16))+""^(17)C(...

If `""^(18)C_(15)+2(""^(18)C_16))+""^(17)C_(16)+1=""^(n)C_(3)`, then n is equal to :

A

19

B

20

C

18

D

24

Text Solution

Verified by Experts

The correct Answer is:
B
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