Only 27.5% of all widgets are green. If four widgets are randomly selected, what is the probability that at least one of them is green?

0.0057

Step-by-step explanation:

Let X be a binomial variable that represents the number of widgets are green.

Given : Probability that a widget is green = 0.275

Sample size : n= 4

Binomial probability distribution formula:

Now, the probability that at least one of them is green will be

Hence, the probability that at least one of them is green = 0.0057