Mathematics · 2022
JEE Main · 26 June 2022, Shift 2 · Q17
The mean and standard deviation of 50 observations are 15 and 2 respectively. It was found that one incorrect observation was taken such that the sum…
The mean and standard deviation of $\displaystyle 50$ observations are $\displaystyle 15$ and $\displaystyle 2$ respectively. It was found that one incorrect observation was taken such that the sum of correct and incorrect observations is $\displaystyle 70$ . If the correct mean is $\displaystyle 16$ , then the correct variance is equal to :
Official answer
(3)
$\displaystyle 43$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.