Question

Robert wants to arrange the books for Statistics, Calculus, Geometry, Algebra, and Trigonometry on a shelf. In how many arrangements can he keep them on the shelf such that the Algebra and Trigonometry books are not together?

Answer 1

@ganeshie8

Answer 2

I think the answer is 24

Answer 3

24 is the number of arrangements such that Algebra and Trigonometry books are together

Answer 4

no, 120 would be. wouldnt it?

Answer 5

Why would he not want to keep them together?

Answer 6

How picky can someone be?

Answer 7

120 is the total arrangements

Answer 8

Number of ways to arrange the books - number of ways to keep them together

Answer 9

Lol right. it just to make me do more work.

Answer 10

lol

Answer 11

So based off what @ParthKohli just said the answer would be like 96?

Answer 12

Indeed.

Answer 13

That is not one of the choices though :/

Answer 14

Now thats interesting, how many of each type of books are there ?

Answer 15

it says just one of each of the 5

Answer 16

try

5! - 2*4! = 72

Answer 17

Oh yes.

Answer 18

so its 72?

Answer 19

Yes does that make sense

Answer 20

Yeah. I just did it a different way. thats why I was off thanks!

Answer 21

np