Mean $= \frac{30}{5} = 6$
$$\sigma^2 = \frac{\sum(x_i - \bar{x})^2}{n} = \frac{16+4+0+4+16}{5} = \frac{40}{5} = 8$$
Back to JEE Main 2023 Probability & Statistics
JEE Main 2023 — Mathematics Probability & Statistics
hard
mcq
2023
Official previous-year question
Verified 30 May 2026.
Question
The variance of the data $2, 4, 6, 8, 10$ is:
Options
- A
$8$
- B
$10$
- C
$6$
- D
$4$
Solution
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