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A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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04 Mar 2014, 00:33
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The Official Guide For GMAT® Quantitative Review, 2ND EditionA certain electronic component is sold in boxes of 54 for $16.20 and in boxes of 27 for $13.20. A customer who needed only 54 components for a project had to buy 2 boxes of 27 because boxes of 54 were unavailable . Approximately how much more did the customer pay for each component due to the unavailability of the larger boxes? (A) $0.33 (B) $0.19 (C) $0.11 (D) $0.06 (E) $0.03 Problem Solving Question: 126 Category: Arithmetic Operations of rational numbers Page: 78 Difficulty: 600 GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition  Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you!
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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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04 Mar 2014, 00:34



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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04 Mar 2014, 15:39
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B? 26.40/54 16.20/54 = ~ .19
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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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04 Mar 2014, 16:49
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i got B as well..same reasoning as Mountain14 but i used sets of 27 instead of 54



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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04 Mar 2014, 19:12
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Per piece price from boxes of 54 = 16.2/54 Per piece price from boxes of 27 = 13.2/27 Excess money paid = 13.2/27  16.2/54 = 13.2/27  8.1/27 = 5.1/27 = 0.19 (nearly) = Answer = B
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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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08 Mar 2014, 21:42
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Is there a reason people are choosing to do long division two times in this problem? Here's how I worked this one out,
Cost for 54 components from one box = $16.20 Cost for 54 components from two boxes = $13.20 * 2 = $26.40 Difference is $26.40  $16.20 = $10.20
We want to know how much more we paid per piece so just take $10.20/54 = .19 cents. Wouldn't this be quicker in most cases?



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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09 Mar 2014, 21:13
I just wanted to find the difference in unit price of each scheme. 54 for $16.2 is the same as 27 for $8.1. That's a difference of 5.3 for 27 items, which is just under 20 cents. The answer is B. Laziness ftw! Actually the difference is 5.1. Perhaps too lazy. Still the closest answer though.



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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31 May 2015, 02:10
for me was the part of dividing the most time connsuming... So, may be this will help you also: 10,20/54 = (Divide by 6) = 1,7/9 = 0,19.... It's much easier to delete 1,7 by 9 than 10,20 / 54
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A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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13 Sep 2015, 00:43
He paid 26.4 instead of 16.2 for 54 items.
So 10.2$ more for 54 or 10.2/54 per item
Or 20.4/108 so closest is .19.



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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22 Nov 2015, 10:36
So far, every time I do one of these arithmetic questions I've found that the answer choices are far enough apart that rounding always works.
15/30 = .5 16/56= 2/7 = .29 = .30
.5.3 = .2
I took me 30 secs to read the question. 30 seconds to do the math.



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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06 Feb 2016, 22:15
Difference in cost per component = (26.4016.20)/54 = 10.2/54. Now since we notice that the answer choices are well separated, we can go for estimation. 10.2/54 is somewhat smaller than 1/5. The only answer choice that does that is B. So B.



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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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16 Jun 2016, 06:18
I have a query here. Request members to share their inputs. As answer choices are quite far from each other, is it right to approx 10.20/54 ~ 10/54 = .18 (close to option B) ?
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Re: A certain electronic component is sold in boxes of 54 for $1 [#permalink]
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