The average of the first 100 positive integers is –

A. 100 B. 51 C. 50.5 D. 49.5 Answer: Option C

Solution(By Apex Team)

According to the question, As we know that average of ‘n’ positive integer is $\begin{array}{l}=\large\frac{n(n+1)}{2\times n}\\ =\large\frac{(n+1)}{2}\\ \text{ Here }\mathrm{n}=100\\ \therefore\large\frac{100+1}{2}\\ =\large\frac{101}{2}\\ =50.5\end{array}$

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years