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Mathematics, 13.01.2021 15:40 shamiya15

4 red bricks have a mean weight of 5kg 5 blue bricks have a mean weight of 9kg
1 green brick has a weight of 6kg

Donna says, "The mean weight of the ten bricks is less then 7kg"

Is donna correct?

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4 red bricks have a mean weight of 5kg 5 blue bricks have a mean weight of 9kg
1 green brick...
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