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.2. Simplify the product (211 1) - (2n 3) - (2n 5) 3 - 1 by realizing what is being counted and using a different

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.2. Simplify the product (211 1) - (2n 3) - (2n 5) 3 - 1 by realizing what is being counted and using a different counting procedure. In short, come up with a combinatorial argument. (Hint: How many ways are there for 271 students to break into groups of two?) [10 pts]

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