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There are 3 different pairs (i.e., 6 uni...

There are 3 different pairs (i.e., 6 units say a, a, b, b, c, c) of shoes in a lot. Now three person come and pick the shoes randomly (each gets 2 units). Let p be the probability that no one is able to wear shoes (i.e., no one gets a correct pair), then the value of `(13p)/(4-p)`, is :

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