0 votes 0 votes How many functions are there from set {1,2,3.....n}, where n is a positive integer, to set {0,1} that assigns 1 to exactly one of the positive integers less than n? Combinatory discrete-mathematics + – aditi19 asked Sep 17, 2018 aditi19 419 views answer comment Share Follow See all 10 Comments See all 10 10 Comments reply Show 7 previous comments srestha commented Sep 17, 2018 reply Follow Share @Magma how?? Only 1 fix it's position among (n-1) elements right? how others ?? 0 votes 0 votes srestha commented Sep 17, 2018 reply Follow Share https://gateoverflow.in/13128/number-of-function 2 votes 2 votes Magma commented Sep 17, 2018 reply Follow Share srestha mam thanks 0 votes 0 votes Please log in or register to add a comment.