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If ""^(n)C(r -1) = 36, ""^(n)C(r) = 84 "...

If `""^(n)C_(r -1) = 36, ""^(n)C_(r) = 84 " and " ""^(n)C_(r +1) = 126`, then find the value of `""^(r)C_(2)`.

A

(8,4)

B

(9,3)

C

(7,5)

D

(6,5)

Text Solution

Verified by Experts

The correct Answer is:
B
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