Question
PSLE
The mass of a container with 40 identical marbles is 760 g. When 19 of the marbles are sold, the mass of the container with the remaining marbles is 475 g. What is the mass of each marble?
2 m

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PSLE
The mass of a container with 40 identical marbles is 760 g. When 19 of the marbles are sold, the mass of the container with the remaining marbles is 475 g. What is the mass of each marble?