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There are 30 ways of selecting the first student leaving 29 ways to select the second for a total of 30 X 29 = 870 ways
6! = 6 factorial = 1x2x3x4x5x6 = 720
have a frined to help u out {in the mean time I believe the answer is that five students can be seated 120 different ways and still be "in circle" as you requested.} Shift+]
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