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  4. In a room there are 6 couples. Out of them if 4 are selected at random, the probability that they may be couples is

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Q. In a room there are 6 couples. Out of them if 4 are selected at random, the probability that they may be couples is

Probability - Part 2

Solution:

$n (S) = ^{12}C_4, n(E) = ^6C_2,P(E) = \frac{1}{33} $