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If n(c(r-1))=36 , n(c(r ))=84 and n(c(r+...

If `n_(c_(r-1))=36 , n_(c_(r ))=84` and `n_(c_(r+1)) = 126`, then the value of r is

A

9

B

3

C

4

D

5

Text Solution

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The correct Answer is:
B
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