NCERT Solutions
Class 11 - Mathematics - Chapter 6: PERMUTATIONS AND COMBINATIONS

EXERCISE 6.2

Evaluate:

(i) \(8!\)

(ii) \(4! - 3!\)

Is \(3! + 4! = 7!\)?

Compute \(\dfrac{8!}{6! \times 2!}\)

If \(\dfrac{1}{6!} + \dfrac{1}{7!} = \dfrac{x}{8!}\), find \(x\)

Evaluate \(\dfrac{n!}{(n-r)!}\) for:

(i) \(n = 6, r = 2\)

(ii) \(n = 9, r = 5\)