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Applied Mathematics · 2024 · 1 mark
CBSE 2024 · Central · Set 4 · Q10
If for a Poisson variate X, P ( X = k )= P ( X = k +1), then the variance of X is:
If for a Poisson variate X,
$$\mathrm{P}(\mathrm{X}=\mathrm{k})=\mathrm{P}(\mathrm{X}=\mathrm{k}+1),$$
then the variance of X is :
Official answer
(C)
$\displaystyle \mathrm{k}+1$
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CBSE Class 12 Applied Mathematics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.