Question 746436: I Have A Final today & these 2 questions are really bothering me . Been on them for almost a hour
1.The probability that a person is a college graduate is 0.41 and that he/she has high blood pressure is 0.37. Assuming that these two events are independent, the probability (to four decimal places) that a person selected at random is a college graduate or has high blood pressure is
2.The probability that a corporation made profits in 2005 is 0.64 and the probability that a corporation made charitable contributions in 2005 is 0.33. Assuming that these two events are independent, the probability (rounded to 4 decimal places) that a corporation made profits in 2005 and made charitable contributions in 2005 is:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1.The probability that a person is a college graduate is 0.41 and that he/she has high blood pressure is 0.37.
Assuming that these two events are independent, the probability (to four decimal places) that a person selected at random is a college graduate OR has high blood pressure is.
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The events are independent but the compound event is an "OR" event.
P(A OR B) = P(A)+P(B)-P(A and B)
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You are give P(A) = 0.41 and P(B) = 0.37 but you are told nothing that
enables you to evaluate P(A and B)
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Ans: insufficient information.
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2.The probability that a corporation made profits in 2005 is 0.64 and the probability that a corporation made charitable contributions in 2005 is 0.33. Assuming that these two events are independent, the probability (rounded to 4 decimal places) that a corporation made profits in 2005 AND made charitable contributions in 2005 is:
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Since the events are independent and the problem is an "AND" event,
multiply the two probabilities to get:
Ans: 0.64*0.33 = 0.2112
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Cheers,
Stan H.
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