Question

What is the cardinality of set?

Answer 1

The cardinality of a set:

The cardinality of a set is the total number of unique elements in a set.

Example:

$A=\left\{1,6,7,8,9\right\}$

The cardinality of a set $A$ is: $n\left(A\right)=5$

Hence,cardinality represents the number of elements in set.