Question
Chris had some black and white balls in a box. First, he added 98 white balls and as a result, 40% of the balls were black. Next, he added another 240 white balls and the number of black balls decreased by 25%.
(a) What percentage of the balls were white in the end?
(b) How many white balls did he have at first?
(a) What percentage of the balls were white in the end?
(b) How many white balls did he have at first?
Answers
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