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Mathematics · 2023

JEE Main · 10 April 2023, Shift 2 · Q19

Let μ be the mean and σ be the standard deviation of the distribution where Σ f_i=62. If [x] denotes the greatest integer ≤ x, then [μ^2+σ^2] is…

Let $\displaystyle \mu$ be the mean and $\displaystyle \sigma$ be the standard deviation of the distribution
$\displaystyle x_i$$\displaystyle 0$$\displaystyle 1$$\displaystyle 2$$\displaystyle 3$$\displaystyle 4$$\displaystyle 5$
$\displaystyle f_i$$\displaystyle \mathrm{k}+2$2k$\displaystyle \mathrm{k}^2-1$$\displaystyle \mathrm{k}^2-1$$\displaystyle \mathrm{k}^2+1$k - $\displaystyle 3$
where $\displaystyle \sum f_i=62$. If $\displaystyle [x]$ denotes the greatest integer $\displaystyle \leq x$, then $\displaystyle \left[\mu^2+\sigma^2\right]$ is equal to
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JEE Main 2023 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.