Josh has been given two assignments, assignment A and assignment B.He estimates that the chance of getting a passing grade on assignment A is 60% and the chance of getting a passing grade on assignment B is 50%.If Josh gets a passing grade on assignment A, he figures his chances of getting a passing grade on assignment B increase to 70%.How likely is it that Josh gets a passing grade on assignment A but not on assignment B?
A).30
B).42
C).18
D).49
E).85

Question

Quizplus · Accepted Answer

The probability of Josh getting a passing grade on assignment A is 60% or 0.6. If he passes assignment A, the probability of him not passing assignment B is 30% (100% - 70%). Therefore, the probability of passing A but not B is 0.6 * 0.3 = 0.18 or 18%.

Josh Has Been Given Two Assignments, Assignment a and Assignment