Question
PSLE
The mass of a box with 45 identical marbles is 905 g. When 28 of the marbles are given away, the mass of the box with the remaining marbles is 485 g. What is the mass of each marble?
2 m

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PSLE
The mass of a box with 45 identical marbles is 905 g. When 28 of the marbles are given away, the mass of the box with the remaining marbles is 485 g. What is the mass of each marble?