Traditional Culture Encyclopedia - Weather inquiry - The weather forecast accuracy of a weather station is 80%. Calculation: (1) There are exactly two accurate probabilities among the three predictions; (2) There are at least two accurate probabilities
The weather forecast accuracy of a weather station is 80%. Calculation: (1) There are exactly two accurate probabilities among the three predictions; (2) There are at least two accurate probabilities
The weather forecast accuracy of a weather station is 80%. Calculation: (1) There are exactly two accurate probabilities among the three predictions; (2) There are at least two accurate probabilities in the three predictions.
( 1)C(3，2)×0.8？ ×( 1-0.8)=0.384
(2)C(3，2)×0.8？ ×( 1-0.8)+C(3，3)×0.8？ ×( 1-0.8)? =0.384+0.5 12=0.896
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