The ratio of the no. of white balls in a bag to that of black balls is 1:2. if 9 grey balls are added the ratio of nos. of white, black and grey become 2:4:3. how many black balls were in the bag?
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there r a total of 12 black balls,6 white balls the ratio of white balls to black balls is 1:2given gray 9 ballsthen ratio becomes 2:4:3in 2:4:3 3 indicates 1/3rd of actual.as black's share is 4 it should be 4*3=12.and whites r 2*3=6.
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20
Answer:
12
Step-by-step explanation:
Given ratio is 2:4:3 which can be written as 2x:4x:3x, where 'x' is the common entity that was cancelled.
Also 3x = 9 , x=3
therefore, black balls = 4*3=12
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