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Mathematics · 2017
JEE Main 2017 · 2017-04-02 Offline · Q85
A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one-by-one, with replacement, then the variance of the number of green…
A box contains $\displaystyle 15$ green and $\displaystyle 10$ yellow balls. If $\displaystyle 10$ balls are randomly drawn, one-by-one, with replacement, then the variance of the number of green balls drawn is :
Official answer
(4)
$\displaystyle \frac{12}{5}$
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JEE Main 2017 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.