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1. Show solution and illustration. Twelve persons are to sit at a round table. Two particular people insist on sitting opposite each other. Find the
1. Show solution and illustration.
Twelve persons are to sit at a round table. Two particular people insist on sitting opposite each other. Find the number of ways the twelve can be seated.
Ans: 3628800
2. Show solution andillustration.How many different 3-place numbers can be formed from the digits 1 to 9 inclusive, if repetitions are allowed?
Ans: 729
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