Traditional Culture Encyclopedia - Weather inquiry - The weather forecast accuracy of a weather station is 80%. What is the probability that three-fifths of the predictions are accurate?
The weather forecast accuracy of a weather station is 80%. What is the probability that three-fifths of the predictions are accurate?
(4/5)*(4/5)*(4/5)*( 1/5)*( 1/5)* C(5，2)= 128/725
Explain that the first accurate probability is 4/5, the second and third accurate probability is 4/5, the fourth and fifth inaccurate probability is 1/5, and then the third accurate and second inaccurate arrangement number is c (5,2) or c (5,3), so multiply this number.
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