Question
A bag contains grey and black beads in the ratio of 2 : 5. There is a total of 105 beads in the bag. How many more grey beads must be added into the bag so that the number of grey beads will be the same as the number of black beads?
2 m

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A bag contains grey and black beads in the ratio of 2 : 5. There is a total of 105 beads in the bag. How many more grey beads must be added into the bag so that the number of grey beads will be the same as the number of black beads?