Question

For the set C={3,5}, determine n(C)

n(C)=

Answer 1

Answer: 2

The notation n(C) translates to "the number of items in set C". So all that you do is count the number of values in the set {3,5} which happens to be two items.

Some books use absolute value notation to indicate the number of items. So some books may write |C| instead of n(C). This concept is known as set cardinality (or the cardinal value of a set).