SOLUTION: The FBI Standard surgery of Crimes reports that 80% of all property crimes NEVER get solved. Suppose a neighborhood suffered repeated property crimes all by different individuals.

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Question 885232: The FBI Standard surgery of Crimes reports that 80% of all property crimes NEVER get solved. Suppose a neighborhood suffered repeated property crimes all by different individuals. The police examine 6 of the cases. Find the expected number of cases that WILL be solved.
This is for an Intro to Statistics Class
Thanks
Jenn
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
80% of the cases are never solved

So 20% are solved (100 - 80 = 20)

If 6 cases are examined, then you expect to have 20% of them solved. So 20% of 6 is 0.20*6 = 1.2

You expect about 1.2 cases to be solved.