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I think the answer is 24
24 is the number of arrangements such that Algebra and Trigonometry books are together
no, 120 would be. wouldnt it?
Why would he not want to keep them together?
How picky can someone be?
120 is the total arrangements
Number of ways to arrange the books - number of ways to keep them together
Lol right. it just to make me do more work.
That is not one of the choices though :/
Now thats interesting, how many of each type of books are there ?
it says just one of each of the 5
try 5! - 2*4! = 72
so its 72?
Yes does that make sense
Yeah. I just did it a different way. thats why I was off thanks!