📐 Mathematics · Relations and Functions · JEE

In a class of 40 students, 20 play cricket, 15 play football, and 8 play both. How many play neither?

Answer: 13.

Correct answer: A. 13

Explanation: n(C union F) = 20 + 15 - 8 = 27. Students playing neither = 40 - 27 = 13.

Concept context

Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.