Question
The average mass of a group of 14 pupils is 39 kg and the average mass of another group of 16 pupils is 36 kg. What is the average mass of the two groups of pupils?
3 m

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The average mass of a group of 14 pupils is 39 kg and the average mass of another group of 16 pupils is 36 kg. What is the average mass of the two groups of pupils?