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March 26, 2017

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The mean age of 30 students in a class is 14 years .5 students with mean of 15 years left the class. Find the mean age of the remaining students?

  • maths - ,

    total age of 30 students: 420
    total age of 5 dropouts: 75
    total age of remaining 25 students: 345
    mean age: 13.8

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