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The ratio of red balls to green balls is 4:3. Three green balls need

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Joined: 14 Jul 2010
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The ratio of red balls to green balls is 4:3. Three green balls need  [#permalink]

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Updated on: 31 Oct 2018, 23:25
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Difficulty:

15% (low)

Question Stats:

92% (00:57) correct 8% (02:03) wrong based on 26 sessions

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The ratio of red balls to green balls is 4:3. Three green balls need to be added in order for there to be the same number of green balls and red balls. How many red balls are there?

A. 3
B. 4
C. 8
D. 12
E. 24

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Originally posted by Baten80 on 31 Oct 2018, 22:49.
Last edited by Bunuel on 31 Oct 2018, 23:25, edited 1 time in total.
Renamed the topic and edited the question.
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Re: The ratio of red balls to green balls is 4:3. Three green balls need  [#permalink]

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31 Oct 2018, 23:10
Let the red balls be 4x and green be 3x.
Questions says : When three green balls are added to existing green balls the number for total green and red balls becomes equal.
3x + 3= 4x

Hence,
x=3

Original red balls were 4x hence 12.

Option (D) is our choice.

Best,

Baten80 wrote:
The ratio of red balls to green balls is 4:3. Three green balls need to be added in order for there to be the same number of green balls and red balls. How many red balls are there?

3

4

8

12

24
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Joined: 22 Feb 2018
Posts: 399
Re: The ratio of red balls to green balls is 4:3. Three green balls need  [#permalink]

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31 Oct 2018, 23:20
OA:D

Initial $$\frac{Red \quad Balls}{Green \quad Balls}=\frac{4x}{3x}$$

After adding $$3$$ Green balls,$$\frac{Red \quad Balls}{Green \quad Balls}=\frac{4x}{3x+3}=1$$

$$4x=3x+3$$

$$x=3$$

Number of Red balls $$= 4x = 4*3=12$$
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Re: The ratio of red balls to green balls is 4:3. Three green balls need &nbs [#permalink] 31 Oct 2018, 23:20
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