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Threre are 9 red,7 white and 4 black balls in an urn. If two balls are selected at random what is the probability that one ball is white and the other
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Threre are 9 red,7 white and 4 black balls in an...
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Nov 13, 2021
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JackTerrance
Threre are 9 red,7 white and 4 black balls in an urn. If two balls are selected at random what is the probability that one ball is white and the other ball is red ? A. 91 190 B. 63 190 C. 5 19 D. 4 95 Select the correct answer from above options
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Nov 13, 2021
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JackTerrance
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Correct Answer - B Total possible outcomes =190 favourable outcomes= selection of 1 ball out of 9 red balls and I ball from from 7 white balls =9C1×7C1=9×7=63 ⇒Required probability = 63 190
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