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# A bag contains $$3$$ white, $$5$$ black, and $$2$$ red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball is drawn is not a red ball.

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#### In a bag $$3$$ balls are white$$2$$ balls are red$$5$$ balls are blackTotal number of balls $$=3+2+5=10$$Number of possible outcome $$=10$$Number of favourable outcome $$=3+5=8$$Not a red ball$$P(E)=\dfrac{Number\ of\ favaourable\ outcome}{Number\ of\ all\ possible\ outcome}=\dfrac{8}{10}=\dfrac{4}{5}$$

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