Sick computers:Let

V

be the event that a computer contains a virus, and let

W

be the event that a computer contains a worm. Suppose

=PV0.28

,

=PW0.45

,

PV

and

=W0.25

.

(a) Find the probability that the computer contains either a virus or a worm or both. (b) Find the probability that the computer does not contain a worm.

Part 1 of 2

(a) Find the probability that the computer contains either a virus or a worm or both.

The probability that the computer contains either a virus or a worm or both is .

Part 2 of 2

(b) Find the probability that the computer does not contain a worm.

The probability that the computer does not contain a worm is