Question
PSLE
The mass of a box with 61 identical marbles is 811 g. When 26 of the marbles are sold, the mass of the box with the remaining marbles is 499 g. What is the mass of each marble?
2 m

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PSLE
The mass of a box with 61 identical marbles is 811 g. When 26 of the marbles are sold, the mass of the box with the remaining marbles is 499 g. What is the mass of each marble?