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06 Jul 2022, 01:30
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E
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Difficulty:
95%
(hard)
Question Stats:
44% (02:48) correct
56%
(02:55)
wrong
based on 157
sessions
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In a recent scientific study, patients with colds were separated into 2 groups and treated with one of two antibiotics, A or B. Twenty-five percent of those that were treated with antibiotic A were in group 1 and 43% of the patients were in group 1. If 72% of patients received antibiotic B, which of the following is closest to the percent of patients in group 2 that received antibiotic B?
A. 21%
B. 28%
C. 36%
D. 50%
E. 63%
Are You Up For the Challenge: 700 Level Questions
A. 21%
B. 28%
C. 36%
D. 50%
E. 63%
Are You Up For the Challenge: 700 Level Questions
06 Jul 2022, 02:24
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We need to set up a double matrix, which is hard to reproduce in text form.
The key fact is: 43% are in group 1. 57% are in group 2. 28% are treated by A. 72% are treated by B.
21% are in group 2 and are treated by A.
36% are in group 2 and are treated by B.
So, the answer is
36/57, which is approximately 63%.
The answer is thus (E).
The key fact is: 43% are in group 1. 57% are in group 2. 28% are treated by A. 72% are treated by B.
21% are in group 2 and are treated by A.
36% are in group 2 and are treated by B.
So, the answer is
36/57, which is approximately 63%.
The answer is thus (E).
