Mathematics, 26.02.2020 05:15 ariana0517
A chemical supply 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 0 1 2 3 4
p(x) 0.4 0.2 0.2 0.1 0.1
(a) Find the mean number of drums ordered.
(b) Find the variance of the number of drums ordered.
(c) Find the standard deviation of the number of drums ordered.
Answers: 3
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