A= { x/x ∈ N and X< 9 } |A| = 8
B ={ x/x+5 = 8 and X∈ N } |B| = 1
number of element in B = 1
number of element in A = 8
let B = {3}
A = { 1,2,3,4,5,6,7}
One One Functions From B ----> A are :
1. {(3,1)}
2. {(3,2)}
3. {(3,3)}
4. {(3,4)}
5. {(3,5)}
6. {(3,6)}
7. {(3,8)}
8. {(3,8)}
Onto Function : From A ---- > B
1. {(1,3) (2,3) (3,3) (4,3) (5,3) (6,3) (7,3) (8,3)}
Number of ONE ONE function from B---->A = 8
Number of ONTO function from A--->B = 1