A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is: Not a red ball
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Step-1: Find probability for a not red ball.
Red ball =1, Black ball=1, Green ball=1.
Total balls in bag=3.
Let P be the probability of getting a not red ball.
Probability=Total no. of outcomesNo. of outcomes(Black and Green)