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anonymous
 one year ago
A school 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 of the secondgrade students occupy the first row?
anonymous
 one year ago
A school 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 of the secondgrade students occupy the first row?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.025P20 5P5 × 20P15 5C5 × 25C14 5P5 × 15P15 5P5 × 25C15
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