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Discussion :: Average

  1. The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% of a mean score of 31. The mean score of remaining 55% is
    2. A.
    40.8 approx
    B.
    45.3 approx
    C.
    51.4 approx
    D.
    53.8 approx

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    Workspace

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    Answer : Option C

    Explanation :


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