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

Asked by  | 24th Apr, 2012, 07:05: AM

Expert Answer:

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.

Answered by  | 30th Apr, 2012, 01:36: PM

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