MCQ
The mean of $1,2,3,4$ .............., $n$ is given by
- A$\frac{n(n+1)}{2}$
- B$\frac{(n+1)}{4}$
- C$\frac{n}{2}$
- ✓$\frac{(n+1)}{2}$
✓
Answer
Correct option: D.
$\frac{(n+1)}{2}$
(d): Sum of the numbers $1,2,3, \ldots, n=n \frac{(n+1)}{2}$
$\therefore \quad$ Mean $=\frac{n(n+1)}{2} \div n=\frac{n+1}{2}$
$\therefore \quad$ Mean $=\frac{n(n+1)}{2} \div n=\frac{n+1}{2}$
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