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Mathematics
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Rent-a-Car agency has either 0,1,2,3,4 or 5 cars returned each day, with probabilities

1/6,1/6,1/3,1/12, 1/6 and 1/12, respectively. Find the mean and the variance of the number of cars returned.

Mar 27th, 2015

x p(x)
0   1/6 
1   1/6 
2   1/3 
3   1/12
4   1/6 
5   1/12
Sum
E(x) 2  1/6 
E(x^2)
v(x) 2  11/36
retd_cars.xlsx 

Mar 27th, 2015

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