Question

Aly 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 0.47 and the probability that she will purchase car B is 0.35. What is the probability that she will not purchase either car A or car B?

0.12

0.41

0.82

0.18

Answer 1

what is A + B ?

Answer 2

if we assume that she will only purchase one car, then A+B + (other) = 1

Answer 3

we know A and we know B ...

Answer 4

0.47 + 0.3 = 0.82

Answer 5

then: .82
+.12
----
1.00

so id say the probability of doing notA or notB is 1 - (A+B) = .12