Question

Marla is looking for a new car. She has test-driven two cars but can only purchase one. The probability that she will purchase car A is 0.52 and the probability that she will purchase car B is 0.38. What is the probability that she will not purchase either car A or car B?

0.10

0.14

0.52

0.90

I know its not the second one.

Answer 1

@amistre64
I have no Idea how im supposed to solve this

Answer 2

Probability of NOT purchasing A or B = 1 - probability that she will purchase car A or car B

so, the probability of purchasing car A or Car B = .52 + .38 = .90

Therefore, the probability she will NOT purchase car A or car B = 1-.90 = .10

Answer 3

ok now i understand thank you

Answer 4

when you have 'or' in the question you add probabilities
when you have 'and' you multiply them

Answer 5

HelpMe....great!