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Q: What number is not the average of 11 and 9 and 8 and 12?

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(8+11+6+12+8) ÷ 5 = 45 ÷ 5 = 9and that's you average ...

12. Add them all up and divide by the number of numbers (3)

The average is 10.

10

10

9

12

11

10.8

The mean average of the given numbers is 10

8+10+12=30 30/3=10 10 is the average of 8 12 and 10 If that's 812 and 10, the average is 411. If that's 8, 12 and 10, the average is 10.

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