Out of a class of 100 students, 25 play at least cricket and football, 15 play at least cricket and hockey, 12 play at least football and hockey and 10 play all the three sports. The number of students playing cricket, football and hockey are 50, 37 and 2
Using the principle of inclusion-exclusion, calculate the total number of students playing sports, subtract this from 100, resulting in 23 students who do not play any sport.