if A={1,2,3,4} B={a,b,c} then write the number of bijections from a to b .
(Answer is 0)

Dear student, 
for number of bijections set A and set B should have same number of elements. 
Other wise it will be zero. 
n(A) = 4, n(B) = 3.
So no of bijective functions from A to B will be zero. 

  • 2
What are you looking for?