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In a recent scientific study, patients with colds were separated into

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In a recent scientific study, patients with colds were separated into  [#permalink]

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New post 31 Mar 2017, 03:53
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

39% (03:10) correct 61% (02:51) wrong based on 107 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%

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In a recent scientific study, patients with colds were separated into  [#permalink]

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New post 31 Mar 2017, 09:53
Assume the number of patients = 1000

Group1Group2Total
A70210280
B360360720
Total4305701000


Required Percentage = 360/570 = 12/19 = 63%

Answer: E
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Re: In a recent scientific study, patients with colds were separated into  [#permalink]

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New post 26 Oct 2018, 00:17
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: In a recent scientific study, patients with colds were separated into   [#permalink] 26 Oct 2018, 00:17
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In a recent scientific study, patients with colds were separated into

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