AMU Engineering 2020 solved paper Solved Paper

We know that, the coefficient of the middle term is the numerically greatest coefficient in the expansion of (1−x)n or (1+x)n and its value is ‌nCn∕α or ‌

‌nCn+1

2

=‌

‌nCn−1

2

according as n iseven or odd.
It is given that the coefficient of the 5 th term is the greatest. Therefore, 5 th term is the middle term. Thus, there are 9 terms. Hence, n=8.