At Least Two Defectives

A production line turns out items independently, each defective with probability $p = 0.20$. An inspector pulls a random sample of $n = 5$ items and lets $X$ be the number of defectives, so $X \sim \text{Binomial}(5, 0.2)$.

What is $P(X \ge 2)$, the probability that at least two items in the sample are defective? Round to 4 decimal places.

$P(X = k) = \binom{n}{k} p^k (1-p)^{n-k}$