SOLUTION: How many proper subsets does the set A=(a,b,c,d) have?

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Question 628591: How many proper subsets does the set A=(a,b,c,d) have?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many proper subsets does the set A=(a,b,c,d) have?
And: 2^4 - 1 = 15
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Cheers,
Stan H.