Let n be a positive integer Suppose we choose a sequence i1i

Let n be a positive integer. Suppose we choose a sequence i1,i2,...,in of integers between 1 and n at random. What is the probability that the sequence contains exactly n-2 different integers?

Solution

Because n is positive integer

so Number of differenent integers between 1 to n (excluding 1 and n) = n-2

Probability of containing exactly N-2 integers = 1

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