Proper subsets

Question

Number of proper subsets for {7,19,4,30}

Answer 1

{7,19,4,30}

there are 2ⁿ subsets where n is the number of elements in the set

there are 2⁴ subsets; there are 16 subsets

a proper subset must not be equal to the set itself

{7,19,4,30} is not a proper subset

there are 15 proper subsets