What is the average number of inversions in an array of N distinct numbers?(a) N(N-1)/4(b) N(N+1)/2(c) N(N-1)/2(d) N(N-1)/3I got this question in my homework.I want to ask this question from Insertion sort topic in chapter Sorting of Data Structures & Algorithms II

What is the average number of inversions in an array of N distinct num

1.	What is the average number of inversions in an array of N distinct numbers?(a) N(N-1)/4(b) N(N+1)/2(c) N(N-1)/2(d) N(N-1)/3I got this question in my homework.I want to ask this question from Insertion sort topic in chapter Sorting of Data Structures & Algorithms II
Answer» Right answer is (a) N(N-1)/4 Easiest explanation - The total number of PAIRS in a list L is N(N-1)/2. Thus, an average list has half this amount, or N(N-1)/4 inversions.

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What is the average number of inversions in an array of N distinct numbers?(a) N(N-1)/4(b) N(N+1)/2(c) N(N-1)/2(d) N(N-1)/3I got this question in my homework.I want to ask this question from Insertion sort topic in chapter Sorting of Data Structures & Algorithms II

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