Question

What is the cardinal number of following sets?

The set of hours in a day

Answer 1

The number of distinct elements in a finite set is called the cardinal number of the set. It is denoted by $n\left(A\right)$

Given set:

The set of hours in a day.

We know that there are $24hours$ in a day.

Therefore, Cardinal number of the set of hours in a day is $n\left(A\right)=24$

Hence, the cardinal number of the set of hours in a day is $24$.