SOLUTION: for the given set, first caclulate the number of subsets for the set then calculate the number of proper subsets {15, 10, 16, 20, 19}

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Question 705937: for the given set, first caclulate the number of subsets for the set then calculate the number of proper subsets {15, 10, 16, 20, 19}
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

The general formula for number of subsets is 2%5En and the number of proper subsets is 2%5En+-+1, where n is the number of elements.
if given set { .15, 10, 16, 20, 19.}, we can see that the number of elements is n=5
so, the number of subsets is
2%5En=2%5E5=32
and the number of proper subsets is
2%5En+-+1=2%5E5+-+1=32-1=31