SOLUTION: Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.)

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Question 955909: Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.)
P(A) = 0.35, P(B) = 0.44, P(A | B) = 0.22
Answer by stanbon(75887) About Me  (Show Source):
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Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.)
P(A) = 0.35, P(B) = 0.44, P(A | B) = 0.22
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P(A and B) = P(A | B)*P(B) = 0.22*0.44 = 0.0968
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Then, P(A or B) = P(A) + P(B) - P(A and B)
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= 0.35+0.44-0.0968
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= 0.693
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Cheers,
Stan H.
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