Consider the type of clothes dryer (gas or electric) purchased by each of five different customers at a certain store.
If the probability that at most one of these purchases an electric dryer is 0.428, what is the probability that at least two purchase an electric dryer?

Question

Consider the type of clothes dryer (gas or electric) purchased by each of five different customers at a certain store.
If the probability that at most one of these purchases an electric dryer is 0.428, what is the probability that at least two purchase an electric dryer?

debbieg · Answer

If NOT at least two purchase, then either 0 or 1 purchase it, right?

P(not A)=1-P(A)