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Of all the computers owned by Company X, 1/3 were

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Of all the computers owned by Company X, 1/3 were  [#permalink]

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New post 29 Jun 2014, 22:35
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78% (01:35) correct 22% (01:34) wrong based on 100 sessions

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Of all the computers owned by Company X, \(1/3\) were manufactured before 1995. If \(1/4\) of the computers manufactured before 1995 were replaced with new computers, the percent of Company X's computer's manufactured before 1995 would be?

A. \(8\) \(1/3\).
B. 12.5%.
C. 20%.
D. 25%.
E. \(27\) \(1/3\)

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Re: Of all the computers owned by Company X, 1/3 were  [#permalink]

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New post 29 Jun 2014, 22:57
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Answer = D = 25%

Say total computers = 1200

\(\frac{1}{3}\) rd are pre-1995 \(= \frac{1200}{3} = 400\)

\(\frac{1}{4}\) th of 400 = 100 (Replaced by new computers)

So total old = 400 - 100 = 300

Percentage \(= \frac{300}{1200} * 100 = 25%\)
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Re: Of all the computers owned by Company X, 1/3 were  [#permalink]

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New post 12 Aug 2018, 02:30
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As 1/4th of the 1/3rd were replaced with new ones that means they're asking 3/4th of 1/3rd that are still manufactured before 1995=1/4=25%.
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Re: Of all the computers owned by Company X, 1/3 were   [#permalink] 12 Aug 2018, 02:30
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Of all the computers owned by Company X, 1/3 were

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