An urn contains 12 red and 18 white marbles. Two marbles are drawn without replacement one after another. What is the probability that first is red and second is white?
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3/10amd18/29 i think so
Srinivasredddy:
No answer is 36/145
what 145
(12*18)/(30*29)
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total number of marbles 12+18 = 30
probability of getting red marbles = 12/30
probability of getting white marbles=18/30
probability of getting red marbles = 12/30
probability of getting white marbles=18/30
if you had drawn out one of the marble then there will be 29 left
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