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In a parking lot, of the vehicles are black and of the remai
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17 Aug 2018, 18:38
17 Aug 2018, 18:38
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Expert Reply
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Question Stats:
79% (00:59) correct
20% (01:02) wrong based on 63 sessions
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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
(A) 8
(B) 12
(C) 20
(D) 30
(E) 35
Re: In a parking lot, of the vehicles are black and of the remai
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14 Oct 2019, 21:52
14 Oct 2019, 21:52
1
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
(A) 8
(B) 12
(C) 20
(D) 30
(E) 35
Attachment:
Screenshot from 2019-10-15 11-51-33.png [ 132.03 KiB | Viewed 5336 times ]
Re: In a parking lot, of the vehicles are black and of the remai
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17 Oct 2020, 14:02
17 Oct 2020, 14:02
1
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.
so, we can inference that such problems will be dependable on the LCM of the fractions.
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.
so, we can inference that such problems will be dependable on the LCM of the fractions.
