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A group of people were administered two kinds of vaccines, R

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Director
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A group of people were administered two kinds of vaccines, R [#permalink] New post 02 Jun 2007, 17:26
A group of people were administered two kinds of vaccines, R and M. Twice as many people received both vaccines as received M only. Twice as many people received R as received M. If 5,000 people received both R and M, how many people received only R?
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 [#permalink] New post 02 Jun 2007, 17:43
I come up with 10,000 is this the OA ?

I drew a Venn diagram, Both R & M = 5000
Only M is 1/2 of Both R & M = 2500

Total number of M is 7500
Total number of R is double of M = 15000

Now we can subtract 5000 from 15000 and get 10,000
  [#permalink] 02 Jun 2007, 17:43
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A group of people were administered two kinds of vaccines, R

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