Question
A bag contains green and grey balls in the ratio of 2 : 7. There is a total of 126 balls in the bag. How many more green balls must be added into the bag so that the number of green balls will be the same as the number of grey balls?
2 m

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A bag contains green and grey balls in the ratio of 2 : 7. There is a total of 126 balls in the bag. How many more green balls must be added into the bag so that the number of green balls will be the same as the number of grey balls?