Question
A bag contains purple and pink balls in the ratio of 2 : 5. There is a total of 77 balls in the bag. How many more purple balls must be added into the bag so that the number of purple balls will be the same as the number of pink balls?
2 m

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A bag contains purple and pink balls in the ratio of 2 : 5. There is a total of 77 balls in the bag. How many more purple balls must be added into the bag so that the number of purple balls will be the same as the number of pink balls?