A box contains four 75 W lightbulbs, three 60 W lightbulbs, and three burned-out lightbulbs. Two bulbs are selected at random from the box. Let X represent the number of 75 W bulbs selected, and let Y represent the number of 60 W bulbs selected.
a. Find the joint probability mass function of X and Y.
b. Find .
c. Find .
d. Find .
e. Find .
f. Find Cov(X,Y).
g. Find .
(a)
(b)
(c)The marginal probability density function of Y is:
(d)
(e)
(f)
(g)
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