There are 2*5! = 240 ways.
The number of ways that 15 books can be arranged on a shelf is the same as the number of permutations of 15 things taken 15 at a time. This is 15 factorial, or 15!, and is 1,307,674,368,000.
5
5040
6! = 1 x 2 x 3 x 4 x 5 x 6.
There are 2*5! = 240 ways.
The number of ways that 15 books can be arranged on a shelf is the same as the number of permutations of 15 things taken 15 at a time. This is 15 factorial, or 15!, and is 1,307,674,368,000.
it depends on the shelf of course
120. You do 5*4*3*2*1=120. you multiply the number that you are given for example how many times can books 3 be arranged on a shelf you multiply 3*2*1=6 that is your answer
The answer depends on how many books on each subject there are.
The number of permutations of five things taken five at a time is five factorial, or 120.
5
5040
6! = 1 x 2 x 3 x 4 x 5 x 6.
7 factorial, or 5,040.
8 ! = 8 X 7 X 6 X 5 X 4 X 3 X 2 X 1 = 40320
You can wind up with 10 different pairs of books in your hand, which you can choose from a shelf of 5 books in 20 different ways.