Q. For a positive integer $n$ , if the mean of the binomial coefficients in the expansion of $(a + b)^{2 n - 3}$ is 16, then $n$ is equal to :

1909 238 JEE MainJEE Main 2018Binomial Theorem Report Error

A

5

28%

B

7

18%

C

9

28%

D

4

26%

Solution:

Correct answer is (a) 5