SOLUTION: I have decided to hold a barbeque on June 21. If the probability that it will rain that day is 0.28 and the probability that the temperature will be less than 15 degrees is 0.13

Question 863412:
I have decided to hold a barbeque on June 21. If the probability that it will rain that day is 0.28 and the probability that the temperature will be less than 15 degrees is 0.13 and I have decided that I will not have the barbeque if it either rains or is colder than 15 degrees, what is the probaility that the barbeque will go ahead? I also know that in June the probability of the temperature being less than 15 degrees and it also raining is 0.13. Give your answer to 2 decimal places

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
I have decided to hold a barbeque on June 21. If the probability that it will rain that day is 0.28 and the probability that the temperature will be less than 15 degrees is 0.13 and I have decided that I will not have the barbeque if it either rains or is colder than 15 degrees, what is the probaility that the barbeque will go ahead? I also know that in June the probability of the temperature being less than 15 degrees and it also raining is 0.13. Give your answer to 2 decimal places
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P(A or B) = P(A) + P(B) - P(A and B)
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P(rain or <15) = 0.28+0.13-0.13 = 0.28
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Therefore: P(rain or <15)' = 1- 0.28 = 0.72
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Cheers,
Stan H.
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