SOLUTION: a set has 9 elements a) how many subsets does it have? b) how many proper subsets does it have? so confused please help

Question 84874: a set has 9 elements
a) how many subsets does it have?
b) how many proper subsets does it have?
so confused please help
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
The number of subsets is always 2 raised to the power of the number of elements in the set. In this case, the answer is .

The number of proper subsets is always 1 less than the number of subsets, since a proper subset is any subset except the set itself! In this case, the answer is .

R^2 at SCC
RELATED QUESTIONS
Let A= { 15,16,17,18,19,20} How many subsets does A have? How many proper subsets does A... (answered by MathLover1)

A={4,5,6,7,8,10,11,12,} How many subsets does A have How many proper subsets does (answered by MathLover1)

Let A = {5,6,7,8,9,11} How many subsets does A have? How many proper subsets does A... (answered by ikleyn)

How many subsets of 3 elements does the set (a, b, c, d, e, f)... (answered by robertb)

How many proper subsets does the set A=(a,b,c,d) have? (answered by stanbon)

How many subsets with more than two elements does a set with 100 elements have? (answered by MathLover1)

How many subsets of 2 elements does the set {!, @, #, $, %} have? (answered by richwmiller)

How many subsets of 2 elements does the set {!, @, #, $, %}... (answered by stanbon)

How many subsets of 2 elements does the set {!, @, #, $, %}... (answered by richwmiller)