Non-Drinker Occasional Drinker Regular Drinker Heavy Drinker Total Men 387 45 90
ID: 2914601 • Letter: N
Question
Non-Drinker
Occasional Drinker
Regular Drinker
Heavy Drinker
Total
Men
387
45
90
37
559
Women
421
46
69
34
570
Total
808
91
159
71
1129
If one of the 1129 people is randomly chosen, find theprobability that the person is a regular drinker or a occasionallydrinker. Round your answer to the nearest 3 decimal places.(References: example 4 page 163, end of section exercises23 - 26 page 168 - 169) (5 points)
Non-Drinker
Occasional Drinker
Regular Drinker
Heavy Drinker
Total
Men
387
45
90
37
559
Women
421
46
69
34
570
Total
808
91
159
71
1129
Explanation / Answer
Pr[reg or occas] = Pr[reg] + Pr[occas] = (159/1129) + (91/1129) =250/1129 ˜ 0.2214
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