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# For what percent of those tested for a certain infection was the test

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Intern
Joined: 16 Mar 2017
Posts: 13
For what percent of those tested for a certain infection was the test [#permalink]

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19 Sep 2017, 08:04
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Difficulty:

(N/A)

Question Stats:

50% (01:11) correct 50% (00:47) wrong based on 6 sessions

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For what percent of those tested for a certain infection was the test accurate; that is, positive for
those who had the infection and negative for those who did not have the infection?

1) Of those who tested positive for the infection, 1/8 did not have the infection.
2) Of those tested for the infection, 90 percent tested negative.

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Math Expert
Joined: 02 Sep 2009
Posts: 46207
Re: For what percent of those tested for a certain infection was the test [#permalink]

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19 Sep 2017, 09:04
petrified17 wrote:
For what percent of those tested for a certain infection was the test accurate; that is, positive for
those who had the infection and negative for those who did not have the infection?

1) Of those who tested positive for the infection, 1/8 did not have the infection.
2) Of those tested for the infection, 90 percent tested negative.

Discussed here: for-what-percent-of-those-tested-for-a-certain-infection-145310.html

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: For what percent of those tested for a certain infection was the test   [#permalink] 19 Sep 2017, 09:04
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