Suppose that in a senior college class of 500 students it is foundthat 210 smoke

Question

Suppose that in a senior college class of 500 students it is foundthat 210 smoke, 258 drink alcoholic beverages, 216 eat betweenmeals, 122 smoke and drink alcoholic beverages, 83 eat betweenmeals and drink alcoholic beverages, 97 smoke and eat betweenmeals, and 52 engage in all three of these bad health practices. Ifa member of this senior class is selected at random, find theprobability that the student

(a) smokes but does not drink alcoholic beverages;

(b) eats between meals and drinks alcoholic beverages but does notsmoke;

(c) neither smokes nor eats between meals

Explanation / Answer

a) 210-122-52 36/500 7.2% b) 83/500 16.6% c) 500-210-216 74/500 14.8%

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