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The ratio of white balls to black balls is 1:2.If 9 grey balls are added then the ratio of white:black:grey is 2:4:3.Find the number of black balls.
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- 12 black balls.
If 9 grey balls added means, ratio of grey = 3 in all (i.e., 9/3 = 3)
Therefore, black balls = 3 *4 = 12
and the White balls = 3 *2 = 6
i.e., White = 6 ; Black = 12 ; Grey = 9 (Since 2:4:3 ratio) - 12 years agoHelpfull: Yes(4) No(1)
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