Question 996545: An outdoor spring festival is planned. The weatherman is predicting a 20% chance of rain, 30% chance of cloudy day and 50% chance of sunshine. The committee feels that if it rains, then only 500 people will attend, if it is cloudy, then only 10000 will attend, and if sunny, then 15000 will attend. How many people can be expected to attend the spring festival?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! Expected value:
500(0.20)=100
10,000(0.30)=3000
15,000(0.50)=7500
Expected number that will come is 10,600, the sum of the 3 probabilities for each random variable.
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