Question
The average mass of a group of 11 students is 33 kg and the average mass of another group of 19 students is 39 kg. What is the average mass of the two groups of students?
3 m

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The average mass of a group of 11 students is 33 kg and the average mass of another group of 19 students is 39 kg. What is the average mass of the two groups of students?