Mathematics · 2015
JEE Main · 11 April 2015, Shift 1 · Q87
If the mean and the variance of a binomial variate X are 2 and 1 respectively, then the probability that X takes a value greater than or equal to one…
If the mean and the variance of a binomial variate $\displaystyle X$ are $\displaystyle 2$ and $\displaystyle 1$ respectively, then the probability that X takes a value greater than or equal to one is :
Official answer
(4)
$\displaystyle \frac{15}{16}$
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JEE Main 2015 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.