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If the number of red marbles is three times the number of green marble

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If the number of red marbles is three times the number of green marble  [#permalink]

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04 May 2017, 02:38
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Difficulty:

15% (low)

Question Stats:

83% (00:39) correct 17% (00:45) wrong based on 47 sessions

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If the number of red marbles is three times the number of green marbles in a bowl of marbles with only two colors of marbles, what is the ratio of the green marbles to all the marbles?

A. 1 : 3
B. 1 : 4
C. 3 : 4
D. 3 : 1
E. 4 : 1

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Re: If the number of red marbles is three times the number of green marble  [#permalink]

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04 May 2017, 05:14
Given R = 3G

Total = R + G = 3G + G = 4G

G/Total = G/4G = 1/4

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Re: If the number of red marbles is three times the number of green marble  [#permalink]

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04 May 2017, 22:29
Given R/G = 3k/1k

Total = Red + Green = 4k
Green/Total = 1k/4k = 1/4
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Re: If the number of red marbles is three times the number of green marble  [#permalink]

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04 May 2017, 23:38
Red:Green = 3:1

So, lets consider there are 30 red marbles and 10 green marbles in the bowl
(which only contains 2 colors of marbles)
Since we need the ratio of Green marbles to the total of all the marbles.
Total marbles = Red + Green = 10+30
Ratio of Green : Total = 10:40 = 1:4(Option B)
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Re: If the number of red marbles is three times the number of green marble &nbs [#permalink] 04 May 2017, 23:38
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