kprincee kprincee

24-01-2018
Mathematics

contestada

The mean average of three numbers is 8. Two of the numbers are 11 and 7. What is the third number? 7 8 or 6

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anchitthawi anchitthawi

25-01-2018

11+7+x /3 = 8

11+7+x=24
x=24-11-7 =6

then the third number is 6

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