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16. The table below shows the incidence of heart disease among people who engage in different levels of alcohol consumption:

Less than 7 drinks per week

7 drinks per week

More than 7 drinks pw

totals

Heart Disease

21

15

32

68

No Heart Disease

119

125

115

359

totals

140

140

147

427

Find the probability that one randomly selected subject has heart disease given that they drink more than 7 drinks per week.