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Evaluate (n!)/(r!(n-r)!) when (i) n ...

Evaluate ` (n!)/(r!(n-r)!)` when
(i) n = 6, r= 2
(ii) n = 10 , r = 3
(iii) for any n with r = 2

Text Solution

Verified by Experts

The correct Answer is:
(i) 15
(ii) 120
(iii) ` (n(n-1))/2`
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