`" How many elements has the Power set of "A" ,if "A" is an empty set ? "`

what is empty set?

No.of elements in Power set

Define empty set .

Two finite sets have m and n elements.The number of elements is the power set of first set is 48 more than the power set of second set.Then (m,n)=

Which of the following is an empty set ?

Which of the following is an empty set ?