Multiple Choice Questions

The average of 11 numbers is 10 8 If the average of the first six be 10 4 and that of the last...........

Quantitative Aptitude (SBI-CL) Average

The average of 11 numbers is 10.8. If the average of the first six be 10.4 and that of the last six is 11.5, then the middle (6th) number is ?

10.3

12.6

13.5

15.5

6th Number = (6*10.4 + 6*11.5 - 11*10.8) = 12.6

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