• (a) and (b) are done. (c) is the only question left.

LetXdenote the number of Canon SLR cameras sold during a particular week by a certain store. The pmf ofXis

x	0	1	2	3	4
pX(x)	0.1	0.2	0.3	0.25	0.15

Sixtypercent of all customers who purchase these cameras also buy an extended warranty. LetYdenote the number of purchasers during this week who buy an extended warranty.

(a) What isP(X= 4,Y= 2)? 0.0518 (b) CalculateP(X=Y).

0.4014 (c) Determine the marginal pmf ofY. (Round your answers to four decimal places.) (yx)(0.6)y(0.4)xyPx(x)

y	0	1	2	3	4
pY(y)