To find the mode of a given data set in a grouped frequency distribution, follow these steps:

1. Identify the modal class: This is the class interval with the highest frequency.

2. Use the mode formula:

{Mode} = L + {f1 - f0} ÷ {2f1 - f0 - f2} × h

where:

- ( L ) = lower boundary of the modal class

- ( f1 ) = frequency of the modal class

- ( f0) frequency of the class preceding the modal class

- ( f2 ) = frequency of the class succeeding the modal class

- ( h ) = class width