Home
Class 11
MATHS
Evaluate (n !)/((n-r)!), when (i) n = ...

Evaluate `(n !)/((n-r)!), ` when
(i) `n = 6, r = 2`
(ii) `n = 9, r = 5`

Text Solution

Verified by Experts

(i) n=6, r=2
`(n !)/((n-r)!) ` = `(6 !)/((6-2)!) `
=30
(ii) `n = 9, r = 5`
`(n !)/((n-r)!) ` = `(9 !)/((9-5)!) `
=15120
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    NCERT|Exercise EXERCISE 7.3|11 Videos

  • MATHEMATICAL REASONING

    NCERT|Exercise EXERCISE 14.3|4 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    NCERT|Exercise EXERCISE 4.1|24 Videos

Similar Questions

Explore conceptually related problems

Evaluate (n!)/((n-r)!) when n=7 and r=2

Evalute (n!)/((n-r)!) . when n=20 and r=2 .

Evaluate (n!)/(r!(n-r)!) when n=5,r=2

Evaluate (n!)/(r!(n-r)!) when : (i) n=6, r=2 (ii) n=7, r=4 (iii) n=15, r=12 .

Evaluate (n!)/((n-r)!) when : (i) n=10,r=4 (ii) r = 1 (iii) r = 2.

Evaluate (n!)/((n-r)!) when n = 12 and r = 3.

Evaluate (n!)/(r!(n-r)!) , where n=15,r=4

Evaluate (n - r) !, when : (i) n=6, r=2 (ii) n=9, r=5

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

Evaluate : (n!)/((n-r)!) where n=5,r=2