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If ""^(n+1)C(3)=4""^(n)C(2) then n=...

If `""^(n+1)C_(3)=4""^(n)C_(2)` then n=

A

12

B

10

C

16

D

11

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • If ""^(n)C_(4)=""^(n)C_(8) , then ""^(n)C_(2) is

    A
    64
    B
    65
    C
    66
    D
    62

  • If ""^(2n ) C_(3) : ""^(n) C_(2) = 44 : 3 then n=

    A
    8
    B
    2
    C
    4
    D
    6

  • If ""^(n)C_(r-1):""^(n)C_(r):""^(n)C_(r+1)=2:4:5 then (n,r) is

    A
    (10,4)
    B
    (9,7)
    C
    (8,3)
    D
    (7,2)

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