# The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate

**Solution:**

We will solve this question by the assumed mean method.

Mean, (x) = a + Σf_{i}d_{i}/Σf_{i}

We know that, class mark, x_{i} = (Upper class limit + Lower class limit) / 2

Taking assumed mean, a = 70

Σf_{i} = 35From the table, we obtain

Σf_{i}u_{i} = - 20

Mean, (x) = a + Σf_{i}u_{i}/Σf_{i}

= 70 + (- 20/35)

= 70 - 0.57

= 69.43

Thus, the mean literacy rate is 69.43%

**Video Solution:**

## The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate

### NCERT Solutions for Class 10 Maths - Chapter 14 Exercise 14.1 Question 9:

The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate

The mean literacy rate based on the literacy rate of 35 cities is 69.43%