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In a certain region, the number of children who have been

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Intern
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Joined: 15 Oct 2007
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In a certain region, the number of children who have been  [#permalink]

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New post 15 Oct 2007, 21:30
1
In a certain region, the number of children who have been vaccinated against rubella is twice the number who have been vaccinated against mumps. The number who have been vaccinated against both is twice the number who have been vaccinated only against mumps. If 5,000 have been vaccinated against both, how many have been vaccinated only against rubella?

A. 2,500
B. 7,500
C. 10,000
D. 15,000
E. 17,500

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Director
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Re: Group (Venn) Question  [#permalink]

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New post 15 Oct 2007, 21:41
1
mistahfold wrote:
In a certain region, the number of children who have been vaccinated against rubella is twice the number who have been vaccinated against mumps. The number who have been vaccinated against both is twice the number who have been vaccinated only against mumps. If 5,000 have been vaccinated against both, how many have been vaccinated only against rubella?

A. 2,500
B. 7,500
C. 10,000
D. 15,000
E. 17,500


R=2M
R&M=2M only

R&M=5000

only M=2500
M=7500

as R=2M so R=15000
then R only=15000-5000=10000

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Re: In a certain region, the number of children who have been  [#permalink]

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New post 31 Oct 2018, 14:14
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 certain region, the number of children who have been   [#permalink] 31 Oct 2018, 14:14
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