1.

In class, students want to join sports. 15 people will join football, 24 people will join basketball, and 7 people will join both. How many people are there in the class?(a) 19(b) 82(c) 64(d) 30This question was posed to me by my college director while I was bunking the class.This key question is from Discrete Probability topic in chapter Discrete Probability of Discrete Mathematics

Answer»

The correct CHOICE is (d) 30

The EXPLANATION: There are 15 PEOPLE who wish to join football, but 9 of those people also join BASKETBALL. By using the principle of inclusion and exclusion, we have: 15 people joining football + 24 people joining basketball – 9 people who will join both = 30 people TOTAL.



Discussion

No Comment Found

Related InterviewSolutions