SOLUTION: At Wired High School, 60% of the students own MP3 players, 50% own notebook computers, and 30% own both. Suppose that you pick a Wired student at random. What is the probability th

Question 252365: At Wired High School, 60% of the students own MP3 players, 50% own notebook computers, and 30% own both. Suppose that you pick a Wired student at random. What is the probability that the student owns at least one of these items?
(a) 0.65 (b) 0.70 (c) 0.80 (d) 0.90 (e) 0.95
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
"60% of the students own MP3 players"
___ but 30% own BOTH, so 30% own ONLY MP3's

"50% own notebook computers"
___ but 30% own BOTH, so 20% own ONLY notebook computers

so 80% (30 + 20 + 30) own one or the other or both

probability is 80% or .80
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