Question

In a group of students,50 passed in english,60 passed in maths and 40 passed in

both.Find the number of students who passed in either English or Maths?

Answer 1

Students who passed only in English = 50-40=10 Students who passed only in maths = 60-40=20 Probability that students passed in english = 10/150 Probability that students passed in maths= 20/150 So, the probability that student selected is passed only in one subject is (10/150+ 20/150) = 30/150= 1/5