In a group of people, the expected number who wears glasses is $2$ and the variance is $1.6$. Fi

Question

In a group of people, the expected number who wears glasses is $2$ and the variance is $1.6$. Find the probability that a person chosen at random from the group wears glasses; $6$ people in the group wear glasses.

Accepted Answer

Under the independent common-probability binomial model: (a) $0.2$. (b) $0.00551$ (3 s.f.).

Finding number of trials and success probability

Finding number of trials and success probability

Solution:

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