Evaluate :
n! / r! ( n - r ) ! , when n = 5 , r = 2
From chapter permutation and combination
Answers
Answered by
7
Hey mate here is your answer :
Put the value of n =5 and r =2
• 5! / 2 ( 5 - 2 ) !
• 5! / 2! * 3!
• 5 * 4 * 3 * 2 / 2 * 3 * 3
• 20 / 2
• 10 is the answer
Put the value of n =5 and r =2
• 5! / 2 ( 5 - 2 ) !
• 5! / 2! * 3!
• 5 * 4 * 3 * 2 / 2 * 3 * 3
• 20 / 2
• 10 is the answer
Similar questions