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Kishor Chaudhary

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Solve..
« on: January 14, 2016, 09:31:26 AM »
Three distinguishable balls are distributed in three cells. Find the conditional probability that all the three occupy the same cell, given that at least two of them are in the same cell.





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« Last Edit: January 14, 2016, 09:42:32 AM by Kishor Chaudhary »
Kishor Chaudhary

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vishwafunda

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Re: Solve probability
« Reply #1 on: January 14, 2016, 11:07:50 AM »
Let E : all the three occupy the same cell
     F : atleast two of them occupy the same cell
Required Probability, P(E/F) = [P(E intersection F) / P(F)]
                                      = 3/21
                                      = 1/7
V K