A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag.
What is the probability that the ball drawn is
(i) Red? (ii) Not red?
(i) Total number of balls in the bag = 8
Probability of the ball drawn to be red. :
= 
= 
(ii) We know that:
P (E) = 1 - P (
)
Hence,
Probability of not getting red ball
= 1 - Probability of getting a red ball
= 1 - 
= 
18