Question 233378
The number of accidents that occur at the intersection
of Pine and Linden streets between 3 p.m. and
6 p.m. on Friday afternoons is 0, 1, 2, or 3, with probabilities
of 0.84, 0.13, 0.02, and 0.01, respectively.
Graph this probability distribution. What is the
expected value for the random variable given the
number of accidents?
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Can't show you the graph on this site.
It is a b.ar graph with 0,1,2,3 on the 
horizontal axis and 0.01,0.2,0.13,and 0.84 on the vertical axis.
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To get the expected value multiply each of 0,1,2,3
by its probability. 
Then add the products.
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Cheers,
Stan H.