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In September 2010, Armando purchased 5 identically priced shirts and

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In September 2010, Armando purchased 5 identically priced shirts and  [#permalink]

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New post Updated on: 03 Oct 2019, 03:09
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In September 2010, Armando purchased 5 identically priced shirts and 3 identically priced pairs of trousers from a certain department store. Armando paid a total of €28.85 for the shirts and €38.97 for the trousers. In October 2010, the department store held a sale, taking 25% off of the September price of everything in the store. Armando returned to the store during the October 2010 sale and bought 11 of the shirts and 7 pairs of the trousers for some friends.

In the table, select how much Armando paid in October for the 11 shirts and 7 pairs of trousers, rounding for each item to the nearest cent. Make only one selection in each column.

Shirts------Trousers
---O----------------O---------47.60
---O----------------O---------63.51
---O----------------O---------68.20
---O----------------O---------79.39
---O----------------O---------90.91
---O----------------O---------204.54

Originally posted by prince00113 on 26 Dec 2018, 12:54.
Last edited by SajjadAhmad on 03 Oct 2019, 03:09, edited 3 times in total.
Updated - Complete topic (28).
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Re: In September 2010, Armando purchased 5 identically priced shirts and  [#permalink]

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New post 23 Jan 2019, 22:53
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answer is Shirts at 47.60

and Trousers at 63.51
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Re: In September 2010, Armando purchased 5 identically priced shirts and  [#permalink]

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New post 24 Jan 2019, 03:14
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Shirts- 47.60
Trousers- 68.20

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Re: In September 2010, Armando purchased 5 identically priced shirts and  [#permalink]

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New post 28 Jan 2019, 17:36
One can do the math and it is time consuming. Is there a shorter quicker trick at solving this?

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Re: In September 2010, Armando purchased 5 identically priced shirts and  [#permalink]

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New post 01 Aug 2019, 19:18
Jkothari1 wrote:
One can do the math and it is time consuming. Is there a shorter quicker trick at solving this?


You can calculate this completely (the IR section gives a calculator), but you can also estimate quite quickly.

For the shirts, 28.85 can be rounded up to 30 euros for 5 shirts, or 6 euros per shirt in September. In October, these are 25% off, or 4.5 euros each. 11 shirts gives 49.50 euros (very easy to do 4.5 * 10 + 4.5). We know we rounded up a bit, so it's reasonable to assume that 47.60 is the right answer - plus there are no other options that are close.

For the trousers, round 38.97 up to 39 euros for 3 pairs, which is 13 euros per pair. At 25% off, these are about 9.75 each in October, I'm going to use 10 because it's an estimate. 10 euros per pair of trousers * 7 pairs gives 70 euros. We know that we overestimated by approximately 0.25 * 7 = 1.75, so we are very confident that 68.20 euros is the proper answer.
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Re: In September 2010, Armando purchased 5 identically priced shirts and   [#permalink] 01 Aug 2019, 19:18
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In September 2010, Armando purchased 5 identically priced shirts and

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