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AMO 2019 Secondary 2 (Grade 8) Question 5

AMO · AMO 2019 Secondary 2 (Grade 8)

Question 5

Mr. and Mrs. Hansen and their three children sit around a circular table. In how many different ways can they sit if the parents sit next to each other? Rotations count as the same seating; reflections count as different. In the figure, Cases 1 and 2 are rotations, but Case 3 is different.

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