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# 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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#### $${\textbf{Step-1: Find probability for a not red ball.}}$$ $${\text{Red ball =1, Black ball=1, Green ball=1.}}$$ $${\text{Total balls in bag=3.}}$$ $${\text{Let P be the probability of getting a not red ball.}}$$ $$\text{Probability=}\dfrac{\text{No. of outcomes(Black and Green)}}{\text{Total no. of outcomes}}$$ $$\text{Probability=}\dfrac{2}{3}$$$${\textbf{Hence, probability of getting red ball is}}$$ $${\mathbf{\dfrac{2}{3}.}}$$

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