I would like to know the step I need to take to solve this question: A retail store has 200 new computers contains five defectives.

I would like to know the step I need to take to solve this question:

A retail store has 200 new computers contains five defectives. If the school randomly bought 4 of these computers, find the probability that the school will get 1 defective computer. Please use the binomial distribution as an approximation to find the probability.