Multiple Choice Questions on The average of 11 numbers is 10 8 If the average of the first six be 10 4 and that of the last........... for Mathematics - All Exams Preparation

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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 ( CCS) Average
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     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

    Incorrect Answer

    12.6

    Correct Answer

    13.5

    Incorrect Answer

    15.5

    Incorrect Answer
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    Explanation:

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

    By: Deepak Dawra
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