Question 786936
If the probabilities that Jane, Tom, and Mary will be chosen chairperson of the board are 0.5, 0.3 and 
0.2 respectively, what is the probability that the chairperson will be either Jane or Mary?
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P(J or M) = P(J)+P(M)-P(J and M)
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P(J or M) = 0.5 + 0.2 - 0.5*0.2 = 0.7-0.1 = 0.6
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Cheers,
Stan H.
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