1 votes 1 votes Derangements are permutations $\pi$ of the set $\{1,2, \ldots, n\}$ such that $\pi(i) \neq i.$ Compute the number of derangements on the set $1,2, \ldots, n$. Combinatory drdocse-2022-paper1 combinatory counting 7-marks descriptive + – admin asked Dec 15, 2022 recategorized Jan 26, 2023 by Lakshman Bhaiya admin 168 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.