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( 3 + 3 + 3 ) There are 6 people. Lets call them 1 , 2 , 3 , 4 , 5 and 6
There are people. Lets call them and Each of them has a hat. They
throw their hats in a box, and then each removes one hat from it each ordering equally likely
Let number of people who get their own hat.
A pair of people is called a swapped pair if each has the other person's hat. There can be at most
three swapped pairs
Let number of swapped pairs.
Compute the following.
a
b
c Var
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