A particular brand of dishwasher soap is sold in three sizes: 30 oz, 40 oz, and 65 oz. Twenty percent of all purchasers select a 30-oz box, 50% select a 40-oz box, and the remaining 30% choose a 65-oz box. Let X1 and X2 denote the package sizes selected by two independently selected purchasers. Determine the sampling distribution of X.
x 30 35 40 47.5 52.5 65
p(x)
Calculate
E(X).
E(X) =
oz