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I need help with these questions

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Detailed Explanation of Permutations and Combinations
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Preview: ... e from the 6 to come into my class.  They were not going to sit, just come in and that's it.  Then if I pick, say Mary, first or 2nd or 3rd, it does not matter when she is picked because she gets no advantage 6C3 = 120/3! = 120/6 = 20 Now the example you gave about there being 9 people on a debate team and each shaking hands with one another, how many hand shakes there would be is a good problem.  However, this does not involve Per ...

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Correct A+ answer with all explanation you need. Feel free to ask questions
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