Question

A bag contains 25 cards, numbered through 1 to 25. A card is drawn at random. What is the probability that the number on the card drawn is a prime number?

Answer 1

Here n(S) = 25

E₃ = Number on the card is prime number.

= {2, 3, 5, 7, 11, 13, 17, 19, 23}

n(E₃) = 9

∴ P(E₃) = `(n(E_3))/(n(S))`

= `9/25`