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# Time n work

Author Message
Intern
Joined: 20 Nov 2017
Posts: 5

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08 Feb 2018, 00:27
A group of workers can complete a certain job in 9 days. But it so happens that every alternate day starting from the second day, 2 workers are withdrawn from the job and every alternate day starting from the third day, one worker is added to the group. If it takes 17 days to finish the job now, find the number of workers who started the job?
a. 5
b. 10
c. 15
d. 20

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Intern
Joined: 20 Nov 2017
Posts: 5

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08 Feb 2018, 00:28
Plz help I didn't able to solve
Math Expert
Joined: 02 Sep 2009
Posts: 49251

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08 Feb 2018, 09:30
legendkiller wrote:
A group of workers can complete a certain job in 9 days. But it so happens that every alternate day starting from the second day, 2 workers are withdrawn from the job and every alternate day starting from the third day, one worker is added to the group. If it takes 17 days to finish the job now, find the number of workers who started the job?
a. 5
b. 10
c. 15
d. 20

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

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. 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: Time n work &nbs [#permalink] 08 Feb 2018, 09:30
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