Question
Mathematics Question on Relations
Let A = {2, 3, 4} and B = {8, 9, 12}. Then the number of elements in the relation R = {((a1, b1), (a2, b2)) ∈ (A × B, A × B) : a1 divides b2 and a2 divides b1} is
A
12
B
18
C
24
D
36
Answer
36
Explanation
Solution
The correct option is(D ): 36