# Ex.3.1 Q7 Data Handling - NCERT Maths Class 7

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## Question

The enrollment in a school during six consecutive years as follows: -

$$1555, 1670, 1750, 2013, 2540, 2820$$

Find the mean enrollment of the school for this period.

## Text Solution

What is known?

Number of enrollments

What is unknown?

Mean

Reasoning:\begin{align}\text{Mean enrollment}=\frac{\text{sum of numbers of enrollments}}{\text{Total numbers of years}}\end{align}

Steps:

Total no. of years $$= 6$$

The enrollments in a school during six consecutive years $$= 1555, 1670, 1750, 2013, 2540, 2820$$

\begin{align}{\text{Mean enrollment}} &= \frac{{{\text{sum of numbers of enrollment}}}}{{{\text{Total numbers of enrollment}}}}\\ &=\frac{{1555 + 1670 + 1750 + 2013 + 2540 + 2820}}{6}\\& = \frac{{12348}}{6}\\& = 2058\end{align}

Thus, the mean enrollment of the school is $$2058.$$

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