Question

17 cards numbered 1, 2, 3, 4, ...., 17 are put in a box and mixed thoroughly. A card is drawn at random from the box. Find the probability that the card drawn bears an odd number.

Answer 1

Total number of cards = 17

 Let  E₁ be the event of choosing an odd number.

These numbers are 1, 3, 5, 7, 9, 11, 13, 15 and 17.

∴ P(getting an odd number) = P(E₁) = `("Number of outcomes favourable to "E_1)/"Number of all possible outcome"`

Thus, the probability that the card drawn bears an odd number is `9/17`.