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

Evaluate `(n!)/((n-r)!)` when :
(i) `n=10,r=4`
(ii) r = 1
(iii) r = 2.

Text Solution

Verified by Experts

The correct Answer is:
(i) 5040
(ii) n
(iii) `n^(2)-n`.
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