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.
raisesiresrises------------------------------------They can be arranged in 5!=120 ways.
6 x 5 x 4 x 3 x 2 x 1 = 720 ways
18
There are 2*5! = 240 ways.
They can't be arranged in a million different 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.
4! = 24, they can be arranged in 24 different ways
raisesiresrises------------------------------------They can be arranged in 5!=120 ways.
There are 45360 ways.
7654321 = 7! = 5,040
It can be arranged in six possible ways.
24 different ways....
There are 40320 ways.
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.