SETS

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A set constant n elements. The power set of this set contains.

If A is the set of days in a week , then set A is

If the number of elements in the power set of set A is 128 then find the number of elements in the set A .

If the cardinality of a set A is 4 and that of a set B is 3, then what is the cardinality of the set AUB?

The set of numbers which are the multiples of 5 is: (A) a finite set (B) an infinite set (C) a singleton set (D) none of these