For customers purchasing a refrigerator at a cer- tain appliance store, let A be the event that the refrig- erator was manufactured in the U.S., B be the event that the refrigerator had an icemaker, and C be the event that the customer purchased an extended war- ranty. Relevant probabilities are P(A) 5 .75 P(BuA) 5 .9 P(BuA9) 5 .8 P(CuAùB)5.8 P(CuAùB9)5.6 P(CuA9ùB)5.7 P(CuA9ùB9)5.3