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Car X and Car Y were members of a cross-country race. If Car X and Car

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Car X and Car Y were members of a cross-country race. If Car X and Car  [#permalink]

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New post 13 Jul 2018, 04:40
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  55% (hard)

Question Stats:

42% (01:15) correct 58% (01:13) wrong based on 30 sessions

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Car X and Car Y were members of a cross-country race. If Car X and Car Y drove a total of 300 miles, how many miles did Car X drive?

(1) Car Y drove 3/4 as many miles as Car X did.

(2) Car X drove 11 percent of all miles driven in the race.

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Car X and Car Y were members of a cross-country race. If Car X and Car  [#permalink]

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New post Updated on: 13 Jul 2018, 05:21
Bunuel wrote:
Car X and Car Y were members of a cross-country race. If Car X and Car Y drove a total of 300 miles, how many miles did Car X drive?

(1) Car Y drove 3/4 as many miles as Car X did.

(2) Car X drove 11 percent of all miles driven in the race.



Total no. of miles drove by x and y = 300.

Question : How many miles car x drove ?

Statement 1:

Let care x drive x miles .

So y drive 3y/4 miles.

We can form an equation . Sufficient.


Statement 2:

Straight . 11% is given . it's the no. of miles driven by x. but we don't know the total no of miles in the race. Insufficient.


The best answer is A.

Originally posted by selim on 13 Jul 2018, 05:12.
Last edited by selim on 13 Jul 2018, 05:21, edited 1 time in total.
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Car X and Car Y were members of a cross-country race. If Car X and Car  [#permalink]

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New post 13 Jul 2018, 05:16
1
selim wrote:
Bunuel wrote:
Car X and Car Y were members of a cross-country race. If Car X and Car Y drove a total of 300 miles, how many miles did Car X drive?

(1) Car Y drove 3/4 as many miles as Car X did.

(2) Car X drove 11 percent of all miles driven in the race.



Total no. of miles drove by x and y = 300.

Question : How many miles car x drove ?

Statement 1:

Let care x drive x miles .

So y drive 3y/4 miles.

We can form an equation . Sufficient.


Statement 2:

Straight . 11% is given . it's the no. of miles driven by x. So, rest of the miles driven by x. Sufficient.


The best answer is D.



11% is given the all miles driven. Do we know that only x and y cars were in the race? Probably no. So we have no idea how much miles were driven by all participants, have we?
Senior Manager
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GPA: 3.68
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Car X and Car Y were members of a cross-country race. If Car X and Car  [#permalink]

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New post 13 Jul 2018, 05:19
LevanKhukhunashvili wrote:
selim wrote:
Bunuel wrote:
Car X and Car Y were members of a cross-country race. If Car X and Car Y drove a total of 300 miles, how many miles did Car X drive?

(1) Car Y drove 3/4 as many miles as Car X did.

(2) Car X drove 11 percent of all miles driven in the race.



Total no. of miles drove by x and y = 300.

Question : How many miles car x drove ?

Statement 1:

Let care x drive x miles .

So y drive 3y/4 miles.

We can form an equation . Sufficient.


Statement 2:

Straight . 11% is given . it's the no. of miles driven by x. So, rest of the miles driven by x. Sufficient.


The best answer is D.



11% is given the all miles driven. Do we know that only x and y cars were in the race? Probably no. So we have no idea how much miles were driven by all participants, have we?



Thanks. understand how i made the mistake. total mile of the race is not's given. we don't know.
Car X and Car Y were members of a cross-country race. If Car X and Car &nbs [#permalink] 13 Jul 2018, 05:19
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