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21 April, 14:26

A bag containing 5 red balls, 8 blue balls and 7 yellow balls, what % of the balls are blue?

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  1. 21 April, 17:37
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    5+7+8=20 which is the total number of balls that the bag contains

    because out of the 20 balls only the 8 are blue, it is right to say that

    8/20 = x/100 ⇒ x = (8·100) / 20 ⇒ x = 800/20 ⇒ x=40

    the blue balls are the 40%
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