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

Explanation

To find the mean literacy rate from the given data of 35 cities, we can follow these steps:

### Step 1: Identify the Data
We need to have the literacy rates and their corresponding frequencies (number of cities) from the table.

### Step 2: Calculate the Midpoint (x_i)
For each interval of literacy rates, we find the midpoint (x_i). The midpoint is calculated as follows:
- For the interval 45-55, the midpoint is (45 + 55) / 2 = 50
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