Q. The mean of the value of $1,\ 2,\ 3,\ ...n$ with respectively frequencies $x,\ 2x,\ 3x,\ \ldots nx$ is
A) $\frac{n}{2}$
B) $\frac{1}{3}(2n + 1)$
C) $\frac{1}{6}(2n + 1)$
D) $\frac{n}{2}$
Explanation
The correct answer is Option B: $\frac{1}{3}(2n + 1)$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.