CBSE 2024 · Region 4 · Set 1 · Q17 · 1 mark
The probability distribution of a random variable X is : $\displaystyle \mathbf{X}$ $\displaystyle 0$ $\displaystyle 1$ $\displaystyle 2$ $\displaystyle 3$ $\displaystyle 4$ $\displaystyle \mathbf{P}(\mathbf{X})$ $\displaystyle 0.1$ k $\displaystyle 2$ k k $\displaystyle 0.1$
where k is some unknown constant. The probability that the random variable X takes the value $\displaystyle 2$ is :
| $\displaystyle \mathbf{X}$ | $\displaystyle 0$ | $\displaystyle 1$ | $\displaystyle 2$ | $\displaystyle 3$ | $\displaystyle 4$ |
| $\displaystyle \mathbf{P}(\mathbf{X})$ | $\displaystyle 0.1$ | k | $\displaystyle 2$ k | k | $\displaystyle 0.1$ |
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle \frac{2}{5}$
ProbabilityRandom Variable and its Probability DistributionApplymcqeasy
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CBSE Class 12 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.