The frequency of a value of a variable is the number of times it appears in a collection of data.

**Example:** What is the frequency of 12 in the following data?

Solution: 12 appears thrice in the collection. So, the frequency of 12 is 3.

**Solved
Example:**

The weights (in kg) of the teachers of a school are recorded as shown below.

60, 65, 63, 70, 65, 62, 65, 63, 64, 60, 68, 58, 62, 65, 63, 65, 64, 60, 62, 63

What is the value of the variable whose frequency is 4?

**Solution:**

63.

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