Question 734286: Suppose that 50% of the women who gave birth at a certain hospital last year were over 30 years old, and that 45% were unmarried. If 55% of the women were over 30 or unmarried (or both), what is the probability that a woman who gave birth at the hospital was both unmarried and over 30?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Suppose that 50% of the women who gave birth at a certain hospital last year were over 30 years old, and that 45% were unmarried. If 55% of the women were over 30 or unmarried (or both), what is the probability that a woman who gave birth at the hospital was both unmarried and over 30?
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P(married AND >30) = P(married)+P(>30) - P(married OR >30)
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= 0.45 + 0.50 - 0.55
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= 0.40
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Cheers,
Stan H.
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