Expert: Steve Holleran - 10/22/2007

Question
We looked at U.S. population that own homes. 30% own a house with only on garage, 40% own a garage and additional parking space, 20% park their car on a street, and 10% have only one parking space.

Question:  What is the probability that we select a household at random that has a garage?

Question:  What is a probability that two homes, selected randomly, would have a garage?

Answer
Hi Becky,

Well, I'm not entirely clear about the question:  are you asking about any house with a garage, or houses with only a garage and no additional parking space?

If its any house with a garage, I would say the probability is 70%, since 30% have one garage, and 40% have a garage and a space.

For the second one, you would multiply .70 * .70 and get 0.49 which is 49%, because you want both events to occur.

Steve Holleran