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<p><span style="font-family: 'times new roman', times, serif;">When you calculate the number of combinations of «math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»r«/mi»«/math» objects taken from a group of «math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»n«/mi»«/math» objects, what are you counting? Give an example.</span></p>
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<p><span style="font-family: 'times new roman', times, serif;">A selection of «math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»r«/mi»«/math» of the «math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»n«/mi»«/math» objects without regard to order. An example of a combination is the number of selections of different playoff teams from a vollyball tournament.</span></p>
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