Question

In a class, 40% of the students participated in Mathematics-quiz, 30% in Science quiz and

10% in both the quiz programmes. If a student is selected at random from the class, find the

probability that the student participated in Mathematics or Science or both quiz

programmes.​

Answer 1

P(AuB) = P(A)+ P(B)-P( Aand B)
= .4+.3-.1
= .6 = 60%