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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 3 · Q11
The probability distribution of a random variable X is given by: Then E ( X ) of distribution is
The probability distribution of a random variable X is given by :
Then $\displaystyle \mathrm{E}(\mathrm{X})$ of distribution is
| X | -$\displaystyle 4$ | -$\displaystyle 3$ | -$\displaystyle 2$ | -$\displaystyle 1$ | $\displaystyle 0$ |
| P(X) | $\displaystyle 0.1$ | $\displaystyle 0.2$ | $\displaystyle 0.3$ | $\displaystyle 0.2$ | $\displaystyle 0.2$ |
Official answer
(A)
$\displaystyle -1.8$
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CBSE Class 12 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.