Question
The average mass of a group of 13 children is 32 kg and the average mass of another group of 17 children is 35 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 13 children is 32 kg and the average mass of another group of 17 children is 35 kg. What is the average mass of the two groups of children?