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GMAT PREP 2 DS Coats

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Viswanathan.harsha
 Post subject: GMAT PREP 2 DS Coats
 Post Posted: Sat Jul 03, 2010 6:40 pm 
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Course Students


Posts: 43
A store purchased 20 coats that each cost an equal amount and then sold each of the 20 coats at an equal price. What was the store's gross profit on the 20 coats?

1) If the selling price per coat had been twice as much, the store's gross profit on thr 20 coats would have been $2,400

2) If the selling price per coat had been $2 more, the store's gross profit on the 20 coats would have been $440


Ron, can you please help with me a explanation on this question.

The OA is B
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adiagr
 Post subject: Re: GMAT PREP 2 DS Coats
 Post Posted: Sun Jul 04, 2010 2:01 am 
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Students


Posts: 89
Viswanathan.harsha wrote:
A store purchased 20 coats that each cost an equal amount and then sold each of the 20 coats at an equal price. What was the store's gross profit on the 20 coats?

1) If the selling price per coat had been twice as much, the store's gross profit on thr 20 coats would have been $2,400

2) If the selling price per coat had been $2 more, the store's gross profit on the 20 coats would have been $440


Ron, can you please help with me a explanation on this question.

The OA is B



Let Cost price per coat is C , and Selling price per coat is S.

Questions asks us whether we can find the value of
20.(S-C).

St. 1

(2S - C). 20 = 2400.

we can't get (S-C).20 from here.

Not sufficient.


St. 2

[(S+2) - C]. 20 = 2400.

(S-C).20 + 40 = 2400

Value of (S-C).20 is known.

So St. 2 is sufficient

(B) is the answer
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Viswanathan.harsha
 Post subject: Re: GMAT PREP 2 DS Coats
 Post Posted: Sun Jul 04, 2010 7:23 pm 
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Course Students


Posts: 43
Nice, it all makes sense now. Thanks for the explanation.
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mschwrtz
 Post subject: Re: GMAT PREP 2 DS Coats
 Post Posted: Tue Jul 13, 2010 12:30 am 
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ManhattanGMAT Staff


Posts: 506
ty adiagr
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