Question

The coefficient of middle term in the expansion of $(1+x{)}^{10}$ is:

• A. 10!/{5!.6!}
• B. 10!/(5!)²
• C. 10!.5!.7!
• D. None of these

Answer 1

The correct option is B

10!/(5!)²

Middle term is $T_{5+1}={}^{10}{C}_5$