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.
52!
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.
It can be arranged in six possible ways.
7654321 = 7! = 5,040
24 different ways....
There are 40320 ways.
The number of permutations of five things taken five at a time is five factorial, or 120.
The answer depends on how many books on each subject there are.