A chemicalsupply company ships a certain solvent in 10 gallon drums. Let X represent the number of drums ordered by a randomly chosen customer. Assume X has the following probability mass function:
|
x
|
1
|
2
|
3
|
4
|
5
|
|
P(x)
|
0.4
|
0.2
|
0.2
|
0.1
|
0.1
|
A) Determine the cumulative distribution functionfor X.
B) Let Y bethe num. of gallons ordered. Find the probability mass function of Y.
C) Find the mean and varianceof the number of gallons ordered.