SOLUTION: The Meteorological Department of Florida has determined that there is a 30% chance that Miami will receive 10 inches of rain in 2010, a 50% chance that it will receive 7 inches of

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Hi

Weighted Averages:

 (30*10in + 50*7in + 20*3in) /100 = 710in/100 = 7.1 in

 7.1 is the average rainfall expected for the year 2010