Question

In case of 100 students, 60 drink tea, 50 drink coffee and 30 think both tea and coffee A students of this class is selected at random. What Is the probability that the student takes (a) at least one of the two drinks (b) only one of the drinks Select the correct answer from above options

Answer 1

Let E: Students drinks tea ⇒ P(E) = 60 100 60 = 3 5 3 F: Student drinks coffee ⇒ P(F) = 50 100 50 = 1 2 1 E n F: Student drinks both tea & coffee P (E ∩ F) = 30 100 30 = 3 10 3