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Jonathan would like to visit one of the 12 gyms in his area. If he sel

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Jonathan would like to visit one of the 12 gyms in his area. If he sel  [#permalink]

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New post 09 Jan 2017, 20:38
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Jonathan would like to visit one of the 12 gyms in his area. If he selects a gym at random, what is the probability that the gym will have both a swimming pool and a squash court?

(1) All but 2 gyms in the area have a squash court.
(2) Each of the 9 gyms with a pool has a squash court.

Please help with this problem.

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Re: Jonathan would like to visit one of the 12 gyms in his area. If he sel  [#permalink]

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New post 10 Jan 2017, 03:08
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anairamitch1804 wrote:
Jonathan would like to visit one of the 12 gyms in his area. If he selects a gym at random, what is the probability that the gym will have both a swimming pool and a squash court?

(1) All but 2 gyms in the area have a squash court.
(2) Each of the 9 gyms with a pool has a squash court.

Please help with this problem.



Hi,

We know there are 12 gyms . For required probability, We are looking for gym with pool+squash court.

1) all but 2 gym have a squash court..
Clearly insuff as nothing about pool..

2) each of the 9 gyms with pool has a squash court.
This means that there are 9 gyms with pool and they have squash court also..
This is what we are looking for.
Probability=9/12=3/4
Suff

B
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Re: Jonathan would like to visit one of the 12 gyms in his area. If he sel  [#permalink]

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New post 19 Mar 2018, 22:04
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Re: Jonathan would like to visit one of the 12 gyms in his area. If he sel &nbs [#permalink] 19 Mar 2018, 22:04
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