Question

number of elements in an empty set is ​

Answer 1

Answer:

empty set is unique set and have no element

Answer 2

Answer:

                                                     

                              EMPTY SET

In mathematics, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero.  In some textbooks and popularizations, the empty set is referred to as the "null set". However null set is a distinct notion within the context of measure theory. In that setting, it describes a set of measure zero; such a set is not necessarily empty. The empty set may also be called the void set. Common notations for the empty set include "{}", " {\displaystyle \emptyset } \emptyset ", and "∅".

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