Mathematics
Mathematics, 28.05.2020 00:00, 903624

The mean of 3 numbers is 7. The mean of
4 other numbers is 8. The mean of 5 other
numbers is 11. What is the mean of all 12
numbers?

answer
Answers: 2

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Do you know the correct answer?
The mean of 3 numbers is 7. The mean of
4 other numbers is 8. The mean of 5 other
numbers...

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