1. Subsets:
A subset is any group of items that can be selected from a larger set, including the possibility of selecting no items at all.
Example:
Imagine you have a set of 3 numbers: 1, 2, and 3.
Possible subsets:
[{}, {1}, {2}, {3}, {1, 2}, {1, 3}, {2, 3}, {1, 2, 3}]
2. Combinations:
A combination is a way of selecting items from a group, where the order does not matter.
Example:
The set: 1,2,and 3.
Possible combinations of two numbers:
[{1, 2}, {1, 3}, {2, 3}]
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