4 votes 4 votes Let f : A → B be function, where A = {1,2,3,4,5,6} and B = {1,2,3,4,5}. If f(1) = 4 then how many surjective (onto) functions are possible ? Set Theory & Algebra zeal set-theory&algebra functions zeal2019 + – Prince Sindhiya asked Nov 11, 2018 edited Mar 6, 2019 by ajaysoni1924 Prince Sindhiya 1.2k views answer comment Share Follow See all 7 Comments See all 7 7 Comments reply Show 4 previous comments Magma commented Nov 27, 2018 reply Follow Share can you tell me that how to subscript and superscript ? I didn't find that func button in this updated version 0 votes 0 votes Shaik Masthan commented Nov 27, 2018 reply Follow Share check this 1 votes 1 votes Magma commented Nov 27, 2018 reply Follow Share Ohk fine :p earlier it was bit easy because both function are very frequently use so sir make a separate button for this two func btw thanks 0 votes 0 votes Please log in or register to add a comment.
Best answer 6 votes 6 votes related theory https://math.stackexchange.com/questions/334420/number-of-onto-functions formula derivation is in given link Gurdeep Saini answered Nov 11, 2018 selected Nov 11, 2018 by Prince Sindhiya Gurdeep Saini comment Share Follow See all 18 Comments See all 18 18 Comments reply Show 15 previous comments Shaik Masthan commented Nov 27, 2018 reply Follow Share @Gurdeep Saini who just down vote but didn't participate in the discussion, doesn't get this comment as notification 0 votes 0 votes Gurdeep Saini commented Nov 27, 2018 reply Follow Share @Shaik Masthan he/she should give the reason what is wrong in this answer 0 votes 0 votes Shaik Masthan commented Nov 27, 2018 reply Follow Share we can't do anything... it's his/her responsibility.... forget about it.. there is No problem with this solution 1 votes 1 votes Please log in or register to add a comment.