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At a certain health club, 30% of the members use both the

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Joined: 06 Jun 2004
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At a certain health club, 30% of the members use both the [#permalink] New post 19 Nov 2005, 23:34
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67% (01:09) correct 33% (00:07) wrong based on 1 sessions
At a certain health club, 30% of the members use both the pool and sauna, but 40% of the members who use the pool do not use the sauna. What percent of the members of the health club use the pool?

(1) 33 1/3%
(2) 40%
(3) 50%
(4) 62 1/2 %
(5) 75%
VP
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Joined: 22 Aug 2005
Posts: 1128
Location: CA
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Kudos [?]: 23 [0], given: 0

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 [#permalink] New post 20 Nov 2005, 00:49
50%

40% who use pool do not use sauna
it mean, 60% of members who use pool ALSO use sauna

this is given as 30% of all members, so
30% of all = 60% of members using pool
members using pool / all = 0.3/0.6 * 100 = 50%
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  [#permalink] 20 Nov 2005, 00:49
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At a certain health club, 30% of the members use both the

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