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Of the 90 houses in a certain community, 60 have a garden. How many

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Of the 90 houses in a certain community, 60 have a garden. How many  [#permalink]

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New post 16 Oct 2017, 13:47
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Question Stats:

41% (01:08) correct 59% (01:23) wrong based on 41 sessions

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Of the 90 houses in a certain community, 60 have a garden. How many houses have a lobby?

1. 50 houses in the community have a garden but do not have a lobby.
2. The number of houses in the community that have both a garden and a lobby is equal to the number of houses that have neither.

Source : Experts Global

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Re: Of the 90 houses in a certain community, 60 have a garden. How many  [#permalink]

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New post 16 Oct 2017, 20:46
pushpitkc wrote:
Of the 90 houses in a certain community, 60 have a garden. How many houses have a lobby?

1. 50 houses in the community have a garden but do not have a lobby.
2. The number of houses in the community that have both a garden and a lobby is equal to the number of houses that have neither.

Source : Experts Global


Hi..

Let's see the statements
1. 50 houses in the community have a garden but do not have a lobby.
60 had garden and 50 have only garden so 10 have both but nothing more.
Insufficient

2. The number of houses in the community that have both a garden and a lobby is equal to the number of houses that have neither.
\(L_{only}+G_{only}+both+neither=90\)
Let both=x=neither...
We are looking for L_only+x...
So \(L_{only}+G_o+B+n=L_o+60+x=90......L_o+x=30\)
So Answer 30
Sufficient

B
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Re: Of the 90 houses in a certain community, 60 have a garden. How many  [#permalink]

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New post 16 Oct 2017, 21:05
pushpitkc wrote:
Of the 90 houses in a certain community, 60 have a garden. How many houses have a lobby?

1. 50 houses in the community have a garden but do not have a lobby.
2. The number of houses in the community that have both a garden and a lobby is equal to the number of houses that have neither.

Source : Experts Global


This is a copy of the following GMAT Prep question: https://gmatclub.com/forum/of-the-75-ho ... 60352.html
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Re: Of the 90 houses in a certain community, 60 have a garden. How many &nbs [#permalink] 16 Oct 2017, 21:05
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