elements in a set???

Question

How many elements are in the set { 3 ,4 ,3 ,5 ,2 ,8 ,4 ,5 ,8 ,9} ?

Answer 1

In mathematics, an element, or member, of a set is any one of the distinct objects that make up that set.

-from wikipedia

 

Keyword: distinct

Writing each element only once = {3,4,5,2,8,9}

6 elements