Mathematics · 2020
JEE Main · 4 September 2020, Shift 1 · Q68
The mean and variance of 8 observations are 10 and 13.5, respectively. If 6 of these observations are 5, 7, 10, 12, 14, 15, then the absolute…
The mean and variance of $\displaystyle 8$ observations are $\displaystyle 10$ and $\displaystyle 13.5$, respectively. If $\displaystyle 6$ of these observations are $\displaystyle 5$, $\displaystyle 7$, $\displaystyle 10$, $\displaystyle 12$, $\displaystyle 14$, $\displaystyle 15$, then the absolute difference of the remaining two observations is :
Official answer
(3)
$\displaystyle 7$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.