Question

Help list the elements in the set DUE

Answer 1

D U E = {16,19,21,18,20}

Explanation:

U represent union

so D U E represents set that contain result set of D and result set of E i.e. D and E combined together.

D U E = {16,19,21,18,20}

16 and 19 were skipped as it were already in set D