The enrolment in a school during six consecutive years was as follows: 1555, 1670, 1750, 2013, 2540, 2820 Find the mean enrolment of the school for this period.

Mean enrolment = Sum of numbers of enrolment/Total number of enrolment
= 1555+1670+1750+2013+2540+2820/6
= 12348/6 = 2058
Thus, the mean enrolment of the school is 2,058.

Class 7 Maths Chapter 3 Exercise 3.1

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