Hi,

If A = {0,1,3,4,6,7}, B = {0,f2,3,5,6}, and C = {0,1,4,6,7}, then A∩B∩C is {0,6}

If A = {2,4,5,7,8}, B = {3,5,8,9}⇒ A∪B is {2,3,4,5,7,8,9} 

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