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Sixty-four percent of the members of a study group are aged 30 or old

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Sixty-four percent of the members of a study group are aged 30 or old [#permalink]

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New post 14 Apr 2017, 20:34
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77% (01:11) correct 23% (01:40) wrong based on 44 sessions

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Sixty-four percent of the members of a study group are aged 30 or older, and 12.5 percent of those individuals aged 30 or older are teachers. If one member of the study group is to be selected at random, what is the probability that the member selected is a teacher aged 30 or older?

A. 0.080
B. 0.100
C. 0.125
D. 0.150
E. 0.165

Source: GMAT Free
[Reveal] Spoiler: OA

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Re: Sixty-four percent of the members of a study group are aged 30 or old [#permalink]

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New post 14 Apr 2017, 21:48
0.64*0.125 = 0.08
Answer is A.
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Re: Sixty-four percent of the members of a study group are aged 30 or old [#permalink]

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New post 15 Apr 2017, 01:56
nguyendinhtuong wrote:
Sixty-four percent of the members of a study group are aged 30 or older, and 12.5 percent of those individuals aged 30 or older are teachers. If one member of the study group is to be selected at random, what is the probability that the member selected is a teacher aged 30 or older?

A. 0.080
B. 0.100
C. 0.125
D. 0.150
E. 0.165

Source: GMAT Free


It seems that GMAT Free just rewords OG and GMAT Prep questions: https://gmatclub.com/forum/sixty-percen ... 43900.html
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Re: Sixty-four percent of the members of a study group are aged 30 or old   [#permalink] 15 Apr 2017, 01:56
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