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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