Question
Tue April 24, 2012 By:
 

sir, what is the meaning of cardinality of a set.how cardinality of a null set 0,please explain.

Expert Reply
Mon April 30, 2012
Cardinality of a set is equal to the number of elements inside the set.
To find the cardinality, count the number of elements in the set , that will give you the cardinality.
For example, A={4,5,6,7,8} has cardinality 5
B={4} has cardinality 1.
 
For a null set, it has no element in it, so number of elements in it is 0 means that its cardinality is also zero.
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