Mathematics, 28.06.2019 17:00 lilygonzalez43
Aschool bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and 5 students from the second grade travel in the bus. how many ways can the students be seated if all the first-grade students occupy the first 3 rows? a. 25p20 b. 5p5 × 20p15 c. 15c15 × 10c5 d. 15p15 × 10p5 e. 15p15 × 10c5
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Aschool bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and 5 students fr...
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