What is the (A∪B)′ for the venn diagram

For the given question:
(AUB)={11,12,13,14,15,16,17}

(Including all the elements of A and B)

Definition of Union of Sets:

Union of two given sets is the smallest set which contains all the elements of both the sets.

To find the union of two given sets A and B is a set which consists of all the elements of A and all the elements of B such that no element is repeated.

The symbol for denoting union of sets is ‘∪’.

Aand b are correctly balanced reactions. they have the same number of atoms in both sides of the reaction