Ex 6.2,4 - Chapter 6 Class 11 Permutations and Combinations

Last updated at July 20, 2026 by

Ex 6.2, 4 - If 1/6! + 1/7! = x/8! find x - Chapter 7 NCERT - Ex 6.2

Remove Ads

Transcript

Ex 6.2, 4 If 1/6! + 1/7! = ( )/8! find x . 1/6! + 1/7! = ( )/8! 8!(1/6! " + " 1/7!) = x 8!/6! + 8!/7! = x (8 7 6!)/6! + (8 7!)/7! = x 8 7 + 8 = x 56 + 8 = x 64 = x x = 64

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.