Question
A bag contains red and white marbles in the ratio of 3 : 7. There is a total of 60 marbles in the bag. How many more red marbles must be added into the bag so that the number of red marbles will be the same as the number of white marbles?
2 m

Click button first when a symbol is required. X

A bag contains red and white marbles in the ratio of 3 : 7. There is a total of 60 marbles in the bag. How many more red marbles must be added into the bag so that the number of red marbles will be the same as the number of white marbles?