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Thirty percent of the members of a swim club have passed the

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Thirty percent of the members of a swim club have passed the [#permalink]

20 Dec 2012, 08:51

00:00

Question Stats:

95% (02:06) correct

4% (01:36) wrong

based on 9 sessions

Thirty percent of the members of a swim club have passed the lifesaving test. Among the members who have not passed the test, 12 have taken the preparatory course and 30 have not taken the course. How many members are there in the swim club?

(A) 60
(B) 80
(C) 100
(D) 120
(E) 140

[Reveal] Spoiler: OA

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Re: Thirty percent of the members of a swim club have passed the [#permalink]

20 Dec 2012, 08:58

Walkabout wrote:

30% of the members have passed the test, thus 70% have not passed the test.

We also know that 30+12=42 members have not passed the test, thus 0.7*Total=42 --> Total=60.

Answer: A.
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Re: Thirty percent of the members of a swim club have passed the [#permalink] 20 Dec 2012, 08:58

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