The following table gives the number of boys of a particular age in a class of 40 students. Calculate the mean age of the students 15 16 17 18 19 20 Age (in years): No.of students: 3 8 10 10 5 4
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Mean = fraction numerator 45 plus 128 plus 170 plus 180 plus 95 plus 80 over denominator 40 end fraction equals 698 over 40 equals 17.45
Hence the mean age is 17.45 yrs
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