Question
The average mass of a group of 14 children is 31 kg and the average mass of another group of 16 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 14 children is 31 kg and the average mass of another group of 16 children is 37 kg. What is the average mass of the two groups of children?