Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • Evaluate n!/(n-r)!, when n=9,r=5

Q.5.     Evaluate \frac{n!}{(n-r)!}, when

            (ii)\; n=9,r=5

Answers (1)

best_answer

To evaluate \frac{n!}{(n-r)!},

Put  n=9,r=5

\frac{n!}{(n-r)!}=\frac{9!}{(9-5)!}

                   =\frac{9!}{4!}

                   =\frac{9\times 8\times 7\times 6\times 5\times 4!}{4!}

                   =9\times 8\times 7\times 6\times 5=15120

Posted by

seema garhwal

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE board exams 2025 from February 15; Class 10, 12 subject-wise marks distribution
anam-khan

CBSE Date Sheet 2025: Class 10, 12 board exam dates soon on cbse.gov.in; previous trends, sample papers
anam-khan

CBSE Board Exams 2025: 75% attendance must for students to be eligible, reiterates board

Latest Question