Mathematics, 03.12.2019 16:31 ShelleyPSeliger
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
Answers: 1
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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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