Mathematics, 03.03.2021 21:10 jojojolie8570

There are 13 students. You need to choose students for three positions: president, secretary, and treasurer. A student can only have one position. However, if Jack is president, then Bob will not participate. In how many ways can you choose students for the position?

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There are 13 students. You need to choose students for three positions: president, secretary, and tr...