Question

A computer retail store has 10 personal computers in stock. A buyer wants to purchase 4of them. Unknown to either the retail store or the buyer, 4 of the computers in stock have defective hard drives. Assume that the computers are selected at random.What is the probability that at least one of the computers selected is defective?

Answer 1

Given

`\begin{gathered} n=10 \\ x=1,2,3,4 \end{gathered}`

We are solving for x = 1, 2, 3,4

Formula

Now

when x=1