Question

What the possible number of proper subsets of A = {2, 3, 5, 7}.

Answer 1

Answer:

-2,-3,-5,-7

Step-by-step explanation:

Answer 2

"if B is a proper subset of A then all the elements of set B contains in set A but set A has at least one element that is not in set B ".

for example if set A ={1,2,3} and set B ={1,2} then B is a proper ser of set A

in normal subset we can said that set A itself is a subset of its own but in proper subset we can't say this

there's an rule through which we can calculate the number of any subset easily --- if a set contains '2' members then the total number of subset of that set is 2² if the number of members is 3 then the number of subset is 2³ it means if the number of members is 'x' then the number of subset is 2 to the power of 'x'

and according to the explanation of proper subset a set can't be the proper subset of itself that's why the number of the proper subset in mentioned question is 2⁴-- 1 =15