how to solve grouping method of mode ?

Mode may be defined as the value that occurs most frequently in a statistical distribution.
 Grouping Table: It has Six Steps as given below.
(1) Frequencies are taken.
(2) Frequencies are added in two(s).
(3) Leaving first item, frequencies are added in two(s)
(4) Frequencies are added in threes.
(5) Leaving first frequency, frequencies are added in three (s)
(6) Leaving first two frequencies, frequencies are added in three (s).
In each case, take maximum total and put it in a circle or a box to distinguish it from others.