Question
PSLE
The mass of a box with 68 identical balls is 803 g. When 20 of the balls are given away, the mass of the box with the remaining balls is 423 g. What is the mass of each ball?
2 m

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PSLE
The mass of a box with 68 identical balls is 803 g. When 20 of the balls are given away, the mass of the box with the remaining balls is 423 g. What is the mass of each ball?