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from a bag containing 5 red ball 8 black ball. A ball is selected at random find the probability it is not a red ball. |
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Answer» Total no. of possible outcomes = 13 {5 red, 8 black} Let E ⟶ event of drawing red ball. No. of favourable outcomes = 5 {5 red balls} Probability, P(E) = (No. of favorable outcomes)/(Total no. of possible outcomes) = 5/13 Bar E⟶ event of not drawing red ball P(Bar E)=1 − P(E) = 1 − 5/13 = (13-5)/13 = 8/13 |
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