According to the question,
A = {2, 4, 6, 8, 12, 20}, B = {3, 6, 9, 12, 15}, C = {5, 10, 15, 20}
Here, U is a universal set
Therefore,
⇒ A ∩ B = {2, 4, 6, 8, 12, 20}∩{3, 6, 9, 12, 15}
= {6, 12},
⇒ B ∩ C = {3, 6, 9, 12, 15}∩{5, 10, 15, 20}
= {15},
⇒ A ∩ C = {2, 4, 6, 8, 12, 20}∩{5, 10, 15, 20}
= {20},
⇒ A ∩ B ∩ C = {2, 4, 6, 8, 12, 20}∩{3, 6, 9, 12, 15}∩{5, 10, 15, 20}
= {}
Hence, the Venn diagram showing relation of given sets is: