SOLUTION: From meteo we know that it rains 20% of the days of a year, but there is sunshine the 50% of the days. From our experience, we know that 80% of the people keep an umbrella when i

Algebra ->  Probability-and-statistics -> SOLUTION: From meteo we know that it rains 20% of the days of a year, but there is sunshine the 50% of the days. From our experience, we know that 80% of the people keep an umbrella when i      Log On


   



Question 854843: From meteo we know that it rains 20% of the days of a year, but there is sunshine the 50% of the days.
From our experience, we know that 80% of the people keep an umbrella when it rains, 10% when there is sunshine and 20% the days without sunshine or rain.
If a morning, without being able to notice the weather, we see a man keeping an umbrella, what is the probability to rain? And what is the probability that there is not sunshine?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
we see a man keeping an umbrella, what is the probability to rain? .80%2A.20
And what is the probability that there is not sunshine .20%2A.50
Note: sunshine the 50% of the days, not sunshine 50%