Evaluate 
,when
(i) n = 6, r = 2
(ii) n = 9, r = 5
(i) Putting the value of n and r:
⇒ 
(ii) Putting the value of n and r:
⇒ 
5
Evaluate ,when
(i) n = 6, r = 2
(ii) n = 9, r = 5
(i) Putting the value of n and r:
⇒
(ii) Putting the value of n and r:
⇒