Question
The average mass of a group of 12 children is 33 kg and the average mass of another group of 20 children is 37 kg. What is the average mass of the two groups of children?
3 m

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The average mass of a group of 12 children is 33 kg and the average mass of another group of 20 children is 37 kg. What is the average mass of the two groups of children?