SOLUTION: The probability of passing the math class of Professor Jones is 62%, the probability of passing Professor Smith's physics class is 34%, and the probability of passing both is 30%.

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Question 952135: The probability of passing the math class of Professor Jones is 62%, the probability of passing Professor Smith's physics class is 34%, and the probability of passing both is 30%. What is the probability of passing one or the other?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
p(a or b) is equal to p(a) + p(b) - p(ab)
a represents the event of passing jones.
b represents the event of passing smith.
ab represents the event of passing both smith and jones.
p(a or b) = p(a) + p(b) - p(ab) = .62 + .34 - .30 = .66
probability of passing smith or jones is 66%.