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

Last updated at August 17, 2026 by

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

Remove Ads Take short quiz All Quiz and Worksheets
Teachoo · Class 11 Explore Class 11

Transcript

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

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.