Question

At Sanger’s auto garage, 40% of the cars brought in for service need an oil change. Of the cars that need oil changes, 30% also need a tire rotation. Find the probability that a car that comes into the auto garage needs both an oil change and a tire rotation.

Answer 1

In probability of usually means multiplication.

What is 30% of 40%?

Answer 2

30% of the 40% that require the thing = 0.3*0.4

Answer 3

how about this .3=P(A and B)/.4 => P(A and B) = .3*.4 = .12