Lets take this with some examples: Let A = { 1, 2, 3, 4, 5, 6} B = { 3, 5, 7, 8, 9 } C = { 1, 6, 8, 9, 11} Ques 1: LHS: B-C= {3,5,7} i.e. all those in C are subtracted from B A - (B-C) = {1,2,4,6} Now
RHS: A-B = {1,2,4,6} (A-B)-C = {2,4} LHS does not equal RHS Hence the statement is FALSE Ques 2: (A-C) = {2,3,4,5} (B-C)= {3,5,7} LHS = (A-C)-(B-C) = {...