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In a parking lot, of the vehicles are black and of the remai

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In a parking lot, of the vehicles are black and of the remai [#permalink] New post 17 Aug 2018, 18:38
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Question Stats:

78% (00:57) correct 21% (01:03) wrong based on 33 sessions
In a parking lot, \(\frac{1}{3}\) of the vehicles are black and \(\frac{1}{5}\) of the remainder are white. How many vehicles could be parked on the lot?

(A) 8
(B) 12
(C) 20
(D) 30
(E) 35
[Reveal] Spoiler: OA

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Re: In a parking lot, of the vehicles are black and of the remai [#permalink] New post 14 Oct 2019, 21:52
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sandy wrote:
In a parking lot, \(\frac{1}{3}\) of the vehicles are black and \(\frac{1}{5}\) of the remainder are white. How many vehicles could be parked on the lot?

(A) 8
(B) 12
(C) 20
(D) 30
(E) 35


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Re: In a parking lot, of the vehicles are black and of the remai [#permalink] New post 17 Oct 2020, 14:02
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Solve by backsolving
Since 1/3 of the vehicles are black eliminate A, C, E, since these are not multiples of 3 and no. of cars must be a whole number.
Check D, 1/3 of 30 = 10, Remaining =20, which is divisible by 5.
Answer D.
Re: In a parking lot, of the vehicles are black and of the remai   [#permalink] 17 Oct 2020, 14:02
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