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# The cardinal number of the empty set is$\left( a \right){\text{ 2}}$$\left( b \right){\text{ 1}}$$\left( c \right){\text{ 0}}$$\left( d \right){\text{ None of these}}$

Last updated date: 20th Jun 2024
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Hint: So for answering this question, we have to know about the cardinal number. Cardinal numbers are those numbers having distinct elements in a finite set. It is generally denoted by $n\left( A \right)$ and it can be read as the number of elements in the set.

Set $A = \left\{ {} \right\}$
Since there is no element in the set. Therefore, we can say that the cardinal number of set $A = 0$ and it will be written as $n\left( A \right) = 0$
Hence, the option $\left( c \right)$ is correct.
For example, if a figure showing the car and the number of the car is $6$ and the car number $99$ has a red roof and it is at ${1^{st}}$ position. Then $6$ will be the cardinal number and ${1^{st}}$ will be the ordinal number and $99$ will be the nominal number.