What is the mode of the numbers: 4, 7, 2, 4, 2, 2, 8, 7, 4, 2?

Mode is ##2##

Mode is the value of the number with highest frequency in the set of data-points that is the one that occurs most often.

To find the mode of numbers ##{4, 7, 2, 4, 2, 2, 8, 7, 4, 2}##, let us first arrange them in increasing order.

In increasing order these are ##{2,2,2,2,4,4,4,7,7,8}##

As ##2## occurs most of the time, the mode is ##2##