Question

Given the following sets:

A = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

B = {3, 6, 9, 12, 15, 18}

C = {4, 8, 12, 16, 20}

Find:

n (A U B)

Do not list the elements.

Answer 1

2,3,4,6,8,9,10,12,14,15,16,18,20

Explanation:

n(A U B)

n( all the elements in sect a and b without repetition)