Relations

What the exams ask here

• probability random relation A->B is a function
• n(AxB)
• is R an equivalence relation
• A x B with (1, 4) and (4, 1) and 4 elements (Indore 2022 Q36)
• number of relations on A is 512 -> |A| = 3
• number of equivalence relations on {1, 2, 3}