find the following set:A∪B∪C

Question

If A={10,20,30,40,50},B={10,20,40,60}, andC={20,30,40,60},

Answer 1

A={10,20,30,40,50}, B={10,20,40,60}, and C={20,30,40,60}, 

A U B U C   =  {10,20,30,40,50}  U {10,20,40,60} U {20,30,40,60}

A U B U C  =  {10, 20, 30, 40, 50, 60}

Answer :

A U B U C  =  {10, 20, 30, 40, 50, 60}