Question

A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is:
(i) a red ball
(ii) not a red ball
(iii) a white ball.

Answer 1

Total number of possible outcomes = 3

∴ P(E) = `1/3`

(ii)

Not a red ball

 Number of favourable outcomes

= Green ball + Black ball

= 1 + 1 + 2

∴ P(E) = `2/3`

(iii)

A white ball

 Number of favourable outcomes = 0

∴ P(E) = `0/3 = 0`