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To install cable television in a home, a certain cable

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To install cable television in a home, a certain cable [#permalink] New post 26 Jun 2011, 06:17
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D
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Difficulty:

  5% (low)

Question Stats:

83% (01:36) correct 17% (01:08) wrong based on 6 sessions
To install cable television in a home, a certain cable company charges a basic fee of $30 plus a fee of $20 for each cable outlet installed in the home. How much did the cable company charge the Horace Family for installing cable television in their home?
1. the cable company installed three cable outlets in the Horace Family home.
2. the amount that the cable company charged the Horace family for installing the Cable television in their home was equivalent to an average charge of $30 per cable installed.
[Reveal] Spoiler: OA

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Re: GMAT PREP TEST 2: Q31 [#permalink] New post 26 Jun 2011, 11:50
Stmt1: the cable company installed three cable outlets in the Horace Family home.
So 30 + 3(20)= 90. Sufficient,

Stmt2: the amount that the cable company charged the Horace family for installing the Cable television in their home was equivalent to an average charge of $30 per cable installed.

Let the cable company installed "x" cable outlets in the Horace Family home.
So total= 30 +x(20)

Average of total amount = 30+x(20) / x = 30
x=3

Total amount = 30 + 3(20) = 90 Sufficient,

OA D.
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Re: GMAT PREP TEST 2: Q31   [#permalink] 26 Jun 2011, 11:50
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To install cable television in a home, a certain cable

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