Question

If a non empty set contains n number of set then how many no. of power set it contains

Answer 1

Each and every set (either empty or non empty) have only one power set( including all the subsets of that set,whom which we are making power set).
so if set has n Number of elements,then it has total
${2}^{n}$
subsets.
so power set includes
${2}^{n} \: sets$