Question

If A = {1,2,3,4,5}, B = {4,5,6,7,8}, C = {7,8,9,10,11}. Find (A ∩ B) ∩ (B ∩ C) by venn diagram.

Answer 1

A intersection B =(4,5)............let it be x

B intersection C = (7,8)...............let it be y

x intersection y= () it is a null set