Question

The probabilities that a student passes in Mathematics, Physics and Chemistry are m, p and c respectively. of these subjects, the students has a 75% chance of passing in at least one, a 50% chance of passing in at least 40%chance of passing in exactly two. which of the following relations are true?

(a) p + m + c = 19/20

(b) p + m + c = 27/20

(c) pmc = 1/10

(d) pmc = 1/4

Answer 1

The correct option is 

(b) p + m + c = 27/20

(c) pmc = 1/10

Explanation:

Let A, B and C respectively denote the events that the student passes in Maths, Physics and Chemistry. It is given :