A study of consumer smoking habits includes 162 people in the 18-22 age bracket (57 of whom smoke), 127 people in the 23-30 age bracket (37 of whom smoke), and 85 people in the 31-40 age bracket (20 of whom smoke). If one person is randomly selected from this sample, find the probability of getting someone who is age 23-30 or smokes.
A) 0.545
B) 0.644
C) 0.291
D) 0.099

Question

Quizplus · Accepted Answer

The probability of getting someone who is age 23-30 is 127/374 = 0.3396. The probability of getting someone who smokes is 114/374 = 0.3048. The probability of getting someone who is age 23-30 or smokes is 0.3396 + 0.3048 - 0.0348 = 0.61.

A Study of Consumer Smoking Habits Includes 162 People in the 18-22