Question
A bag contains gold and grey balls in the ratio of 3 : 11. There is a total of 70 balls in the bag. How many more gold balls must be added into the bag so that the number of gold balls will be the same as the number of grey balls?
2 m

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A bag contains gold and grey balls in the ratio of 3 : 11. There is a total of 70 balls in the bag. How many more gold balls must be added into the bag so that the number of gold balls will be the same as the number of grey balls?