Question
A bag contains pink and brown marbles in the ratio of 3 : 7. There is a total of 80 marbles in the bag. How many more pink marbles must be added into the bag so that the number of pink marbles will be the same as the number of brown marbles?
2 m

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A bag contains pink and brown marbles in the ratio of 3 : 7. There is a total of 80 marbles in the bag. How many more pink marbles must be added into the bag so that the number of pink marbles will be the same as the number of brown marbles?