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Perry buys a book that has pages numbered from 1 to 980. He then selec

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Perry buys a book that has pages numbered from 1 to 980. He then selec  [#permalink]

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New post 26 Nov 2019, 01:56
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  55% (hard)

Question Stats:

35% (02:34) correct 65% (03:02) wrong based on 17 sessions

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Perry buys a book that has pages numbered from 1 to 980. He then selects one of the pages at random. What is the probability that the number of the page he selects is divisible by 7, given that it is divisible by 3?

A. \(\frac{1}{21}\)

B. \(\frac{1}{7}\)

C. \(\frac{23}{163}\)

D. \(\frac{23}{490}\)

E. \(\frac{29}{171}\)


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Re: Perry buys a book that has pages numbered from 1 to 980. He then selec  [#permalink]

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New post 26 Nov 2019, 02:06
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1
pages divisble by 3 ; 980/3 ; ~ 326
and LCM of 3,7 = 21 ; ~ 46 pages
P = 46/326 ; 23/163
IMO C


Bunuel wrote:
Perry buys a book that has pages numbered from 1 to 980. He then selects one of the pages at random. What is the probability that the number of the page he selects is divisible by 7, given that it is divisible by 3?

A. \(\frac{1}{21}\)

B. \(\frac{1}{7}\)

C. \(\frac{23}{163}\)

D. \(\frac{23}{490}\)

E. \(\frac{29}{171}\)


Are You Up For the Challenge: 700 Level Questions
GMAT Club Bot
Re: Perry buys a book that has pages numbered from 1 to 980. He then selec   [#permalink] 26 Nov 2019, 02:06
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Perry buys a book that has pages numbered from 1 to 980. He then selec

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