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Please answer the Question in 2-3 ways not only by symmetry

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Joined: 03 May 2014
Posts: 70

Kudos [?]: 57 [0], given: 43

Concentration: Operations, Marketing
Schools: ISB '17 (D)
GMAT 1: 680 Q48 V34
GMAT 2: 700 Q49 V35
WE: Engineering (Energy and Utilities)
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Please answer the Question in 2-3 ways not only by symmetry [#permalink]

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New post 24 Jun 2014, 07:53
A medical researcher must choose one of 14 patients to receive an experimental
medicine called Progaine. The researcher must then choose one of
the remaining 13 patients to receive another medicine, called Ropecia.
Finally, the researcher administers a placebo to one of the remaining 12
patients. All choices are equally random. If Donald is one of the 14 patients,
what is the probability that Donald receives either Progaine or Ropecia?
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Beat verbal, Beat GMAT...;)
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Kudos [?]: 57 [0], given: 43

Please answer the Question in 2-3 ways not only by symmetry   [#permalink] 24 Jun 2014, 07:53
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Please answer the Question in 2-3 ways not only by symmetry

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