Mathematics · 2023
JEE Main · 29 January 2023, Shift 1 · Q79
Three rotten apples are mixed accidently with seven good apples and four apples are drawn one by one without replacement. Let the random variable X…
Three rotten apples are mixed accidently with seven good apples and four apples are drawn one by one without replacement. Let the random variable $\displaystyle X$ denote the number of rotten apples. If $\displaystyle \mu$ and $\displaystyle \sigma^2$ represent mean and variance of $\displaystyle X$, respectively, then $\displaystyle 10\left(\mu^2+\sigma^2\right)$ is equal to
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 20$
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JEE Main 2023 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.