in Set Theory & Algebra edited by
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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 ?
in Set Theory & Algebra edited by
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4 Comments

can you tell me that how to subscript and superscript ?

I didn't find that func button in this updated version
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check this

 

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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
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1 Answer

5 votes
5 votes
Best answer

related theory https://math.stackexchange.com/questions/334420/number-of-onto-functions

formula derivation is in given link

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4 Comments

@Gurdeep Saini

who just down vote but didn't participate in the discussion, doesn't get this comment as notification

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@Shaik Masthan he/she should give the reason what is wrong in this answer 

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we can't do anything... it's his/her responsibility.... forget about it.. there is No problem with this solution
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