A bag contains 4 red balls, 5 blue balls and 7 green balls
MATHEMATICS · Multi-part · A Level · Mathematics · Probability · Probability
Problem
A bag contains 4 red balls, 5 blue balls and 7 green balls. One ball is drawn at random.
(i) List the three natural events connected with the colour of the ball and comment on whether they are mutually exclusive.
(ii) Find the probability that the ball drawn is either red or green.
(iii) Verify that the probability of drawing a ball of any colour from the bag is 1 by using your answers to part (ii) and the appropriate probability axiom.