Question

There are 35 students in a class of whom 20 are boys and 15 are girls. From these students one is chosen at random. What is the probability that the chosen student is a girl?

Answer 1

Let E₂ be the event that the chosen student is a girl.

∴ P(choosing a girl) = P(E₂) =`("Number of outcome favourable to"  E_2)/"Number of all possible outcome"= 15/35 = 3/7`

Thus, the probability that the chosen student is a girl is `3/7.`