The probability of event A occurring given that event B has already occurred is 0.61. The probability of both events occurring is 0.5. What is the probability of event B occurring?
A) 0.305
B) 0.195
C) 0.390
D) 0.820
E) 0.500

Name: The probability of event A occurring given that event B has already occurred is 0.61. The probability of both events occurring is 0.5. What is the probability of event B occurring? A) 0.305 B) 0.195 C) 0.390 D) 0.820 E) 0.500
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Question

Quizplus · Accepted Answer

P(B) = P(A ∩ B) / P(A | B) = .5/.61 = 0.81967

The Probability of Event a Occurring Given That Event B