Hats 1,2,3,4,5,6
1,2
1,3
1,4
1,5
1,6
2.3
2,4
2,5
2,6
3,4
3,5
3,6
4,5
4,6
5,6
15 different combinations
Well because only one is needed cause the answer is 0.1
So, 9 out of 10 students prefer class, so, obviously, it would not be 100. It would be 150. So in conclusion, 50 students prefer lunch over math class, whilst 150 other students prefer math class over lunch.
