Statistics · Mathematics · WB JEE
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WB JEE 2021
The mean and variance of a binomial distribution are 4 and 2 respectively. Then the probability of exactly two successes is
WB JEE 2017
Mean of n observations x1, x2, ...., xn is $$\overline x $$. If an observation xq is replaced by xq' then the new mean is...