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If n and r are integers such that ...

If n and r are integers such that ` 1 le r le n` then `n. C (n-1,r-1)=`

A

`n(n,r)`

B

`n.c(n,r)`

C

`r .C (n,r)`

D

`(n-1).C(n,r)`

Text Solution

Verified by Experts

The correct Answer is:
C
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