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A certain computer manufacturing firm last year produced 82 percent of

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A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 16 Nov 2015, 02:15
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Question Stats:

85% (01:05) correct 15% (01:22) wrong based on 184 sessions

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A certain computer manufacturing firm last year produced 82 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?

A. 5,400
B. 6,000
C. 18,000
D. 60,000
E. 600,000

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Re: A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 16 Nov 2015, 03:16
as given , 18% = 10800
or 0.18x=10800
x=60,000
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Re: A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 16 Nov 2015, 05:09
0.18x=10800
x=60,000
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Re: A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 16 Nov 2015, 09:19
1
Bunuel wrote:
A certain computer manufacturing firm last year produced 82 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?

A. 5,400
B. 6,000
C. 18,000
D. 60,000
E. 600,000


ALWAYS scan the answer choices before performing any calculations. In this case, most of the answer choices are spread out nicely, so I might get a little aggressive with my ESTIMATION.

A certain firm produced 82 percent of its computers using parts made by its subsidiary company
So, about 4/5 of the computers used parts from subsidiary company
This leaves 1/5 of the computers REMAINING

...the REMAINING 10,800 computers were produced using parts purchased from another parts manufacturer
Ah! So, 10,800 represents the REMAINING 1/5 of the computers.

...how many computers were produced by the computer manufacturing firm altogether?
10,800 represents 1/5 of the computers, the TOTAL number of computers ≈ (10,800)(5) ≈ (11,000)(5) ≈ 55,000

When we check the answer choices, we see that D is the ONLY answer that's close to 55,000

For more on when to estimate, check out our free video - http://www.gmatprepnow.com/module/gener ... video/1111

Cheers,
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Re: A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 16 Nov 2015, 11:11
Bunuel wrote:
A certain computer manufacturing firm last year produced 82 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?

A. 5,400
B. 6,000
C. 18,000
D. 60,000
E. 600,000


IMHO (D)

Bunuel wrote:
A certain computer manufacturing firm last year produced 82 percent of its computers using parts made by its subsidiary company. If the remaining 10,800 computers were produced using parts purchased from another parts manufacturer, how many computers were produced by the computer manufacturing firm altogether?


82% parts used of subsidary company, so 18% parts used of other companies.

Now, 18% parts = 10,800 computers
So, 1% parts = 10,800/18
Or, 100% parts = 60,000 computers.

Hence answer is (D)
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Re: A certain computer manufacturing firm last year produced 82 percent of  [#permalink]

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New post 29 Nov 2018, 13:58
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Re: A certain computer manufacturing firm last year produced 82 percent of &nbs [#permalink] 29 Nov 2018, 13:58
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