Mathematics · 2019
JEE Main · 12 April 2019, Shift 1 · Q87
If the data x_1, x_2, ….., x_10 is such that the mean of first four of these is 11, the mean of the remaining six is 16 and the sum of squares of all…
If the data $\displaystyle x_1, x_2, \ldots . ., x_{10}$ is such that the mean of first four of these is $\displaystyle 11$, the mean of the remaining six is $\displaystyle 16$ and the sum of squares of all of these is $\displaystyle 2,000$ ; then the standard deviation of this data is :
Official answer
(2)
$\displaystyle 2$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.