Saved Bookmarks
| 1. |
Compute the ""^9C_4 + ""^9C_5 |
|
Answer» SOLUTION :`""^9C_4 + ""^9C_5= (9!)/(4!5!)+(9!)/(5!4!)` ` = (9*8*7*6)/(4*3*2*1)xx2 =252` |
|