A bag contains 3 red balls and 5 black balls.
The probability that the ball is (i) red (ii) not red
The total number of balls = No. of red balls + No. of black balls
So, the total no. of balls = 5+3 = 8
We know that the probability of an event is the ratio between the no. of favourable outcomes and the total number of outcomes.
P(E) = (Number of favourable outcomes/ Total number of outcomes)
(i) Probability of drawing red balls = P (red balls) = (no. of red balls/total no. of balls) = 3/8
(ii) Probability of drawing black balls = P (black balls) = (no. of black balls/total no. of balls) = 5/8
(i) The probability that the ball drawn is red = 3/8
(ii) The probability that the ball drawn is not red= 5/8