1.

There is a class of 40 students out of which 16 are girls. There are 27 students who are right-handed. How many minimum numbers of girls who are left-handed in this class?(a) 17(b) 56(c) 23(d) 3This question was addressed to me in an internship interview.My doubt stems from Addition Theorem on Probability in section Discrete Probability of Discrete Mathematics

Answer» RIGHT option is (d) 3

To explain I would say: Number of GIRLS in the class is 16. Number of left-handed PUPILS + Number of right-handed pupils = 40. So, Number of left-handed pupils + 27 = 40, Number of left-handed pupils = 13. Therefore, the minimum number of right-handed girls is 16 – 13 = 3.


Discussion

No Comment Found

Related InterviewSolutions