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Mathematics
Combinatorics
Permutations
There are 10 students participating in a spelling bee. In how many ways can the students who go first and second in the bee be chosen?
1 answer
There are 10 choices for the first student and 9 choices remaining for the second student (because one has already been chosen). Therefore, there are $10\times 9 = \boxed{90}$ ways to choose the first two students in the bee.
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