Please help with the cardinality of the following set!!!!

Question

What is the cardinality of the following set?

(This can have many answers)

a.) 0

b.) 4

c.) 7

d.) 3

Answer 1

This is pretty straight forward. This set is comprised of all odd integer numbers between 1 and 7. Thus, our set is equal to {1, 3, 5, 7} which has the size (cardinality) of 4.