Digital PSAT Math Practice Question 27: Answer and Explanation
Question: 27
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.
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?
- A. 36%
- B. 40%
- C. 48%
- D. 52%
Correct Answer: B
Explanation:
(B) There are 40 patients with both conditions, 50 who have only high cholesterol, and 30 who have only high blood pressure:
Divide 120 by the 300 total to find the percent:
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