engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Relations and Functions Operations on Relations
Let R = {x | x ∈ N, x is a multiple of 3 and x ≤ 100}
S = {x | x ∈ N, x is a multiple of 5 and x ≤ 100}
What is the number of elements in (R × S) ∩ (S × R)?
1
36
2
33
3
20
4
6