Let E = event that a computer owner shops on the Internet; P(E) = 0.17
    F = event that a computer owner downloads software; P(F) = 0.33

Then, the event that a computer owner will either shop on the Internet or download software is P(EF), and is given by

P(EF)	=	P(E) + P(F) - P(EF)
	=	0.17 + 0.33 - 0.14 = 0.36

To return to the review exercises, just close this window.