Question

Three-seventh of the students in a class are good at playing football. If the strength of the class is 42, the number of students who are good at playing football is​

Answer 1

Answer:

Those who play ONLY Hockey and Cricket are 7 - 2 = 5;

Those who play ONLY Cricket and Football are 4 - 2 = 2;

Those who play ONLY Hockey and Football are 5 - 2 = 3;

Hence, 5 + 2 + 3 = 10 students play exactly two of these sports.