Multiple Choice Questions on The average of 11 numbers is 10 9 If the average of the first six numbers is 10 5 and that of the la........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The average of 11 numbers is 10 9 If the average of the first six numbers is 10 5 and that of the la...........

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    The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

    11.5

    Correct Answer

    10

    Incorrect Answer

    10.5

    Incorrect Answer

    12.5

    Incorrect Answer
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    Explanation:

    Middle numbers  =  [(10.5 x 6 + 11.4 x 6) - 10.9 x 11] = (131.4 - 119-9) = 11.5.

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