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What is the variance of the distribution

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David Axehead sells new cars for Axehead Ford. David usually sells the largest number of cars on Saturday. He has developed the following probability distribution for the number of cars he expects to sell on a particular Saturday.

Number of Cars sold, x Probability, P(x)

0 0.10

1 0.20

2 0.30

3 0.30

4 0.10

Total 1.00

a. On a typical Saturday, how many cars does David expect to sell?

b. What is the variance of the distribution?

c. What is the standard deviation of the distribution?

Reference no: EM131214129

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