Ex 6.2, 5 (i) - Chapter 6 Class 11 Permutations and Combinations

Last updated at July 20, 2026 by

Ex 6.2, 5 - Evaluate n! / (n − r)! , when n = 6, r = 2 - Teachoo - Ex 6.2

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Ex 6.2, 5 Evaluate n!/(n − r)! , when n = 6, r = 2 n!/(n − r)! Putting n = 6 & r = 2 = 6!/(6 − 2)! = 6!/4! = (6 × 5 × 4!)/4! = 6 × 5 = 30

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