SOLUTION: 30.List all subsets for the set {1,5} Which one of these subsets is not a proper subset?

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Question 990063: 30.List all subsets for the set {1,5} Which one of these subsets is not a proper subset?
Answer by ikleyn(52754) About Me  (Show Source):
You can put this solution on YOUR website!
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#1: {empty set};

#2: the subset consisting of one element {1};

#3: the subset consisting of one element {2};

#4: the subset consisting of two elements {1, 2}. It coincides with the entire set.

Totally, 4 subsets.