A bag contains 4 red balls, 8 white balls, 5 green balls and 7 black balls all of the same size. One ball is picked up at random from the bag. Complete the following activity to find the probability of the following events.
(i) Event A : the ball picked up is black. (ii) Event B: the ball picked up is not green. (iii) Event C: the ball picked up is white.
Total number of balls : n(S) =24
n(C) =...... P(C) = n(C)/n(S)=......