Hi all, I have 3 classes with around 60 students in total. I am going to distribute a white shirt to each of them for a group event. The shirts were printed with number on the back (e.g. 1 to 60).

Now, what formula should I use to determine what is the major color in each group?

For instance,

Group A 1 2 5 4 10 Majority:Green

Group B 3 19 7 11 12 Majority:Blue

Group C 13 19 16 14 17 Majority:Blue

Group D 8 9 15 6 20 Majority: Green

1 Blue
2 Green
3 Blue
4 Green
5 Blue
6 Green
7 Blue
8 Green
9 Blue
10 Green
11 Blue
12 Green
13 Blue
14 Green
15 Blue
16 Green
17 Blue
18 Green
19 Blue
20 Green

Please assist on this matter, thank you!