Question

$n(A) 3,n(B) = 2$ then the number of surjections from $A$ to $B$

• A. 3
• B. 6
• C. 8
• D. 9

Answer 1

Answer: (B)

6

Answer 2

If $n(A) = n, n(B) = 2$ then the no. of onto functions from $A$ to $B = 2^n - 2$