Probability 59073

A group of n people, including Jano and Fero, randomly line up. What probability will there be exactly r people (r

Correct answer:

p = fr(2*(n-r-1),n*(n-1))

Step-by-step explanation:

A = n (n1)/2 B = nr1  p = AB  p=n (n1)2 (nr1)

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