Decimals between 10 and 15 with an interval of .75 between each pair of decimals

This is a sum that needs understanding the starting and the ending number first. then you should understand that between the starting and the ending number there has to be pairs of numbers with a difference of 0.75.
The numbers are:
10.75, 11.50, 12.25, 13.00, 13.75, 14.50.

72 is the mode because it shows up the most number of times