Answers

2015-12-14T15:23:41+08:00
That would be 9 choose 5. In symbols, C(9,5), which is equal to 126.




- D.E.
1 1 1
P(n,r0
P(n,r) ,n=9;r=5       P(9,5)= 9.8.7.6.5        15120
I see. Thanks for correcting. :)