SOLUTION: A study of consumer smoking habits includes 168 people in the 18-22 age bracket (48 of whom smoke), 131 people in the 23-30 age bracket (36 of whom smoke), and 99 people in the 31-

Algebra ->  Probability-and-statistics -> SOLUTION: A study of consumer smoking habits includes 168 people in the 18-22 age bracket (48 of whom smoke), 131 people in the 23-30 age bracket (36 of whom smoke), and 99 people in the 31-      Log On


   

Question 800625: A study of consumer smoking habits includes 168 people in the 18-22 age bracket (48 of whom smoke), 131 people in the 23-30 age bracket (36 of whom smoke), and 99 people in the 31-40 age bracket (28 of whom smoke). If one person is randomly selected from this sample, find the probability of getting someone who is age 18-22 or does not smoke.
My Work:
168+131+99=398
168-48=120
120/398=0.302
My study guide shows the answer = 0.839, I do not know how to get this answer.
Answer by MathTherapy(10552) About Me  (Show Source):
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A study of consumer smoking habits includes 168 people in the 18-22 age bracket (48 of whom smoke), 131 people in the 23-30 age bracket (36 of whom smoke), and 99 people in the 31-40 age bracket (28 of whom smoke). If one person is randomly selected from this sample, find the probability of getting someone who is age 18-22 or does not smoke.
My Work:
168+131+99=398
168-48=120
120/398=0.302
My study guide shows the answer = 0.839, I do not know how to get this answer.

P(18 – 22 or DNS) -------- P(18 – 22) or P(DNS)

P(18 – 22) + P(DNS) – P(18 - 22 & DNS)

%28168%2F398%29+%2B+%28286%2F398%29+-+%28120%2F398%29

454%2F398+-+120%2F398

P(18 - 22 or DNS): 334%2F398, or highlight_green%280.839196%29

You can do the check!!

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