In a box, there are 9 red, 8 white and 3 black balls. One ball is taken out at random.
Determine the probability that it is (a) White (b) Not Red (iii) Green.
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a. Probability of a white ball= No. of white balls/ Total no. of balls= 8/20= 2/5
b. Probability of a not red ball= White balls+ black balls/ total balls= 11/20
c. Probability of a green ball= No. of green balls/ total balls= 9/20
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