Question
PSLE
The mass of a box with 50 identical marbles is 742 g. When 18 of the marbles are sold, the mass of the box with the remaining marbles is 490 g. What is the mass of each marble?
2 m

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PSLE
The mass of a box with 50 identical marbles is 742 g. When 18 of the marbles are sold, the mass of the box with the remaining marbles is 490 g. What is the mass of each marble?