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You own 6 hats and are taking 2 on vacation. In how many ways can you choose 2 hats from the 6?
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You own 6 hats and are taking 2 on vacation. In how many ways can you choose 2 hats from the 6?

User Jesse Chen
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15 options. Go in order from hat 1 & hat 2, hat 1 & hat 3, and so on, and order doesn't matter, so continue on to hat 2 & hat 3, hat 2& hat 4, etc.
User Yitzhak Khabinsky
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