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

## 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 \(2058.\)