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there are 22 students in mario's class. mario's teacher is planning to pair the students up for a project. how many different combinations of pairs are possible? 462 44 11 231

User Shreyank
by
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1 Answer

7 votes

22! / 20! × 2!


21 * 11 = 231 \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\

User Randomir
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