1.

A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.(i) Number of days: 0 − 6 6 − 12 12 − 18 18 − 24 24 − 30 30 − 36 36 − 42 Number of students: 10 11 7 4 4 3 1 (ii) Number of days: 0 − 6 6 − 10 10 − 14 14 − 20 20 − 28 28 − 38 38 − 40 Number of students: 11 10 7 4 4 3 1

Answer» A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.

(i)























Number of days: 0 − 6 6 − 12 12 − 18 18 − 24 24 − 30 30 − 36 36 − 42
Number of students: 10 11 7 4 4 3 1



(ii)























Number of days: 0 − 6 6 − 10 10 − 14 14 − 20 20 − 28 28 − 38 38 − 40
Number of students: 11 10 7 4 4 3 1


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