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Difficulty:
15%
(low)
Question Stats:
88% (01:05) correct
12%
(01:53)
wrong
based on 66
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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
A. 3
B. 4
C. 8
D. 12
E. 24
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01 Nov 2018, 00:10
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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,
Gladiator59
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,
Gladiator59
Baten80
01 Nov 2018, 00:20
Kudos
Bookmarks
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 \(= 4x = 4*3=12\)
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 \(= 4x = 4*3=12\)
