IBPS Government Jobs Exams Numerical Ability Probability

An urn contains 9 blue, 7 white and 4 black balls. If 2 balls aredrawn at random, then what is the probability that only one ball is white?

Read Solution (Total 3)

9c1*7c1+7c1*4c1/20c2
10 years agoHelpfull: Yes(2) No(0)

7c1*13c1/20c2=21/190
8 years agoHelpfull: Yes(2) No(0)
.478
9c1*7c1/20c2=91/190
10 years agoHelpfull: Yes(0) No(1)

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