medium · GRE Quant
A conference has 8 distinct delegates, 2 of whom are the keynote co-chairs. For a working dinner, exactly 5 of the 8 delegates will be seated around a round table, and the 2 keynote co-chairs must both be among those selected and seated next to each other. Rotations of the same seating are considered identical, and reflections are considered different. How many valid seatings are possible?
- 240
- 1344
- 480
- 120
- 672
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