GMAT PREP 2 DS Coats

[Viswanathan.harsha]

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

[adiagr]

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

[Viswanathan.harsha]

Nice, it all makes sense now. Thanks for the explanation.

[mschwrtz]

ty adiagr