Q1: Case 1: In a survey of 2000 men who had heart attack in Dammam in 2015, a total of 300 reported taking an aspirin at leas

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Q1: Case 1: In a survey of 2000 men who had heart attack in Dammam in 2015, a total of 300 reported taking an aspirin at least 4 times a week during the month before having a heart attack. Calculate the prevalence of heart attack in Dammam:
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