SOLUTION: Each day, a weather forecaster predicts whether or not it will rain. For 80% of rainy days, she correctly predicts that it will rain. For 91% of non-rainy days, she correctly predi

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Question 1112344: Each day, a weather forecaster predicts whether or not it will rain. For 80% of rainy days, she correctly predicts that it will rain. For 91% of non-rainy days, she correctly predicts that it will not rain. Suppose that 9% of days are rainy and 91% are non-rainy.
What proportion of the forecasts are correct?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
9*0.8=7.2
91*.91=82.81
the sum is 90.01 per cent