Of the articles from a certain production line, $10$% are defective. If a sample of $25$ article

Question

Of the articles from a certain production line, $10$% are defective. If a sample of $25$ articles is taken, find the expected number of defective articles and the standard deviation.

Accepted Answer

$2.5$, $1.5$.

Expected value and variance of binomial distribution

Expected value and variance of binomial distribution