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 second-grade students occupy the first row?
what are your answer choices?
i think i know how to do this one but i want to verify my answer
i would simply multiply 25 by 15
because we dont need to worry about the first row
my bad 20 x 15
because 5 seats are taken xD
5! multiply 15!
is 300 an answer choice?
25P20 5P5*20P15 5C5*25C14 5P5*15P15 5P5*25PC15
those are my choices
what is the "c"?
5P5 * 15P15 is there answer
i dont really now what it is asking for, so follow kentari on this one
kentari what does the p stand for?
i am lost xD
On the first row. There are 5 choices out of 5 seats. So it would be 5P5. On the rest. There are 15 choices out of 15 seats. So it would be 15P15. So 5P5 * 15P15 would get your answer
i will just leave it to you <3
ohh kentari you genius xD
@jennyrlz It's just our topic in school. =D
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