Question
A bag contains blue and red marbles in the ratio of 2 : 11. There is a total of 91 marbles in the bag. How many more blue marbles must be added into the bag so that the number of blue marbles will be the same as the number of red marbles?
2 m

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A bag contains blue and red marbles in the ratio of 2 : 11. There is a total of 91 marbles in the bag. How many more blue marbles must be added into the bag so that the number of blue marbles will be the same as the number of red marbles?