A man makes a gift basket which he sells during December and

he wants to determine how many gift baskets to make for the current season. It

costs $$40$ to prepare a gift basket and it is sold for $$60.$ The gift baskets are typically

sold in December. Gift baskets left unsold at the end of December are sold for $$15$ each. How

many gift baskets should the man prepare at the beginning of December, assuming that the

demand for the month can be described by the following probability distribution?

D

$200220300320340$

$0\mathrm{.}1$

$0\mathrm{.}2$

$0\mathrm{.}4$

$0\mathrm{.}2$

$0\mathrm{.}1$

$..(..)$