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In insertion sort, the average number of comparisons required to place the 7^th element into its correct position is ____

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In insertion sort, the average number of comparisons required to place the 7^th element into its correct position is ____

(a) 9

(b) 4

(c) 7

(d) 14

This question was addressed to me in an online quiz.

This key question is from Insertion sort in portion Sorting of Data Structures & Algorithms II

1 Answer

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Best answer
Right option is (b) 4

Best explanation: On average (k + 1) / 2 comparisons are required to place the k^th element into its correct position. Therefore, average number of comparisons required for 7th element = (7 + 1)/2 = 4.

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