+1 vote
22 views

The coefficient of $x^6y^3$ in the expression $(x+2y)^9$ is

1. $84$
2. $672$
3. $8$
4. none of these

recategorized | 22 views

+1 vote

The answer is option b :672

Using above formula if you put k=3 you will get value as 672

by (21 points)