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Evaluate (n!)/((r!)xx(n-r)!), when n = ...

Evaluate `(n!)/((r!)xx(n-r)!)`, when n = 15 and r = 12.

Text Solution

Verified by Experts

The correct Answer is:
455
`(15!)/((12!)xx(3!))=(15xx14xx13xx(12!))/(6xx(12!))=455.`
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