Question

Use the following information:

U = x

A = x is an odd natural number less than 16

B = x is a prime number greater than 5

(Note: The prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17, and 19.) Find the cardinality of each set.

Answer
n(B')

Answer 1

n(B') = 15

Explanation:

Assumunin U is the universal set.

B = { 7,11,17,19}

B' = natural numbers different form 7,11,17 and 19 = {1,2,3,4,5,6,8,9,10,12,13,14,15,16,18}