Exam-Style Problem
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June 2012 p61 q7
2792
Seven friends together with their respective partners all meet up for a meal. To commemorate the occasion they arrange for a photograph to be taken of all 14 of them standing in a line.
- How many different arrangements are there if each friend is standing next to his or her partner? [3]
- How many different arrangements are there if the 7 friends all stand together and the 7 partners all stand together? [2]
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