The following table represents the probability of the number of cars owned by a college student.Give your answer to at least 3 decimal places.

x	P(x)
0	0.45
1	0.35
2	0.13
3	0.07

a) Is this a valid discrete probability distribution? Select an answer

No, since P(x) 1 and P(x) < 0

Yes, since P(x) 1 and P(x) > 0

No, since P(x) = 1 and 0 P(x) 1

Yes, since P(x) = 1 and 0 P(x) 1

b) Find the mean number of cars owned.

c) Find the standard deviation of the number of cars owned.

d) Find2.