Answer :

To do this consider,


B C = {1, 5, 10, 15, 20, 30} {7, 8, 15, 20, 35, 45, 48}


= {15, 20}


A \ (B C) = A \ {15, 20}


= {10, 25, 30, 35, 40, 45, 50} … (1)


Now, A \ B = {10, 15, 20, 25, 30, 35, 40, 45, 50} \ {1, 5, 10, 15, 20, 30}


= {25, 35, 40, 45, 50}


And A \ C = {10, 15, 20, 25, 30, 35, 40, 45, 50} \ {7, 8, 15, 20, 35, 45, 48}


= {10, 25, 30, 40, 50}


Then, (A \ B) (A \ C) = {25, 35, 40, 45, 50} {10, 25, 30, 40, 50}


= {10, 25, 30, 35, 40, 45, 50} … (2)


From (1) and (2), it follows that A \ (B C) = (A \ B) (A \ C).


Hence, verified.


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