The table shows the results of a research study that investigated the therapeutic value of vitamin C in preventing colds. A random sample of 300 adults received either a vitamin C pill or a sugar pill each day during 2 weeks, and the adults reported whether they contracted a cold during that period. What proportion of adults who received a sugar pill reported contracting a cold?
Correct answer: B. 11/50
- A. 11/18
- B. 11/50
- C. 9/50
- D. 11/100
Explanation
Choice B is correct. A total of 150 adults received the sugar pill. Of those, 33 reported contracting a cold. Therefore, 33/150 , or the equivalent of 11/50 , is the proportion of adults receiving a sugar pill who reported contracting a cold.
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Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.
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