The
Lemon
brand cars have a transmission which
fails with probability .6, and brakes which fail with
probability .3; the two kinds of failures occur inde-
pendently. What is the probability that exactly one
of the failures occurs when you drive a
Lemon
?
(a) .72
(b) .28
(c) .46
(d) .54
(e) .9
(f) none of the above

Question

The
Lemon
brand cars have a transmission which
fails with probability .6, and brakes which fail with
probability .3; the two kinds of failures occur inde-
pendently. What is the probability that exactly one
of the failures occurs when you drive a
Lemon
?
(a) .72
(b) .28
(c) .46
(d) .54
(e) .9
(f) none of the above

misty1212 · Answer

one or the other but not both 
both is $0.3\times 0.6$