PSAT Math Multiple-Choice Practice Question 576

Question: 576

300 patients at a hospital were categorized based on whether they had high or low cholesterol and on whether they had high or low blood pressure. The results are tabulated in the table below.
High Cholesterol
Low Cholesterol
Total
High Blood Pressure
40
30
70
Low Blood Pressure
50
180
230
Total
90
210
300

What is the percent chance that one of the 300 patients will have at least one of the conditions—high cholesterol or high blood pressure

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