Question

Stats Question

Real estate ads suggest that 63% of homes for sale have garages, 21% have pools, and 18% have both features. What is the probability that a home for sale has:
a) A pool or garage?
b) Neither a pool or garage?
c) A pool but no garage?

Answer 1

For a I have to use the formula: P(A) + P(B) - P(A n B) =

Answer 2

Yeah, my teacher drew that out for us today. I don't really get what goes in the formula for part a though.

Answer 3

So the entire garage circle is 63% and the entire Pool circle is 21%. But these two percentages also contain the percentage of houses which have both. So you should add together the 63% and the 21%, and subtract the 18%, which is the intersection of A and B.

Answer 4

yeah i see that now.