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If the ratio of brown cars to blue cars in a certain parking lot is 2:

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Bunuel
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If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   25 Jul 2016, 10:10
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25% (01:03) correct 75% (00:51) wrong based on 162 sessions
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If the ratio of brown cars to blue cars in a certain parking lot is 2:3, how many brown cars are in the lot?

(1) There are 15 blue cars in the lot
(2) There are 25 cars total in the lot
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A
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msk0657
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Re: If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   25 Jul 2016, 12:01
Bunuel wrote:
If the ratio of brown cars to blue cars in a certain parking lot is 2:3, how many brown cars are in the lot?

(1) There are 15 blue cars in the lot
(2) There are 25 cars total in the lot


Let Br - Brown cars , BL = Blue cars.

Given BR/BL = 2/3

=> BR = BL(2/3) --> Question stem.

Stat 1 : Given 15 blue cars in the lot . We get BR = 15(2/3) = 10 cars...Sufficient..

Stat 2 : BR + BL = 25.

BR = 25 - BL... Sub this value in question stem..

25 - BL = BL(2/3).

75 - 3BL = 2BL
75 = 5BL => BL = 15. Then BR = 10 cars.. Sufficient...

IMO option D is correct answer..

OA please...Will correct if I missed anything...
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Kurtosis
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Re: If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   25 Jul 2016, 12:09
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msk0657 wrote:
Bunuel wrote:
If the ratio of brown cars to blue cars in a certain parking lot is 2:3, how many brown cars are in the lot?

(1) There are 15 blue cars in the lot
(2) There are 25 cars total in the lot


Let Br - Brown cars , BL = Blue cars.

Given BR/BL = 2/3

=> BR = BL(2/3) --> Question stem.

Stat 1 : Given 15 blue cars in the lot . We get BR = 15(2/3) = 10 cars...Sufficient..

Stat 2 : BR + BL = 25.

BR = 25 - BL... Sub this value in question stem..

25 - BL = BL(2/3).

75 - 3BL = 2BL
75 = 5BL => BL = 15. Then BR = 10 cars.. Sufficient...

IMO option D is correct answer..

OA please...Will correct if I missed anything...


Brown : Blue = 2 : 3

St1: Blue = 15. If 3/5 corresponds to 15, 2/5 corresponds to 10. Number of brown cars = 10. Sufficient

St2: There are 25 cars in total. --> Question does not state that the parking lot contains only brown and blue cars. So we cannot determine the number of brown cars from the given statement. Not Sufficient

Answer: A
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If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   26 Jul 2016, 00:39
Vyshak wrote:
msk0657 wrote:
Bunuel wrote:
If the ratio of brown cars to blue cars in a certain parking lot is 2:3, how many brown cars are in the lot?

(1) There are 15 blue cars in the lot
(2) There are 25 cars total in the lot


Let Br - Brown cars , BL = Blue cars.

Given BR/BL = 2/3

=> BR = BL(2/3) --> Question stem.

Stat 1 : Given 15 blue cars in the lot . We get BR = 15(2/3) = 10 cars...Sufficient..

Stat 2 : BR + BL = 25.

BR = 25 - BL... Sub this value in question stem..

25 - BL = BL(2/3).

75 - 3BL = 2BL
75 = 5BL => BL = 15. Then BR = 10 cars.. Sufficient...

IMO option D is correct answer..

OA please...Will correct if I missed anything...


Brown : Blue = 2 : 3

St1: Blue = 15. If 3/5 corresponds to 15, 2/5 corresponds to 10. Number of brown cars = 10. Sufficient

St2: There are 25 cars in total. --> Question does not state that the parking lot contains only brown and blue cars. So we cannot determine the number of brown cars from the given statement. Not Sufficient

Answer: A


in DS gmat questions both the argument give the same value whatsoever

you either take choice A or B both will give total number of cars as 25.Unless the values are diff in both cases(here for total number of cars) we can't assume what you saying above in statement 2.

Unless the question states there are more cars , we on our own can't assume there are more cars.

Answer will be D
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Kurtosis
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Re: If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   26 Jul 2016, 02:50
hsbinfy wrote:
Vyshak wrote:

Brown : Blue = 2 : 3

St1: Blue = 15. If 3/5 corresponds to 15, 2/5 corresponds to 10. Number of brown cars = 10. Sufficient

St2: There are 25 cars in total. --> Question does not state that the parking lot contains only brown and blue cars. So we cannot determine the number of brown cars from the given statement. Not Sufficient

Answer: A


in DS gmat questions both the argument give the same value whatsoever

you either take choice A or B both will give total number of cars as 25.Unless the values are diff in both cases(here for total number of cars) we can't assume what you saying above in statement 2.

Unless the question states there are more cars , we on our own can't assume there are more cars.

Answer will be D


You are assuming that you get an unique solution using Statement 2. If there are only brown and blue cars then the number of brown cars is 10.

Consider a case where there are brown, blue and red cars and their ratio is 2:3:20. Number of brown cars = (2/25) * 25 = 2.

As seen above, Statement 2 results in multiple solutions and 2 brown cars doesn't match the value of the result obtained using Statement 1.
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Re: If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink] New post   21 Sep 2020, 06:55
Hello from the GMAT Club BumpBot!

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Re: If the ratio of brown cars to blue cars in a certain parking lot is 2: [#permalink]
21 Sep 2020, 06:55
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