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How many ways can Cindy arrrange 42 books in different shelf if each shelf has to be the same?
Wiki User
∙ 12y ago
It depends on how many shelves there are, which you did not specify. Please restate the question.
Assuming that there are just 2 shelves with 21 books on each, then the 21 books on the top shelf can be arranged in factorial 21 different ways, with the same result for the lower shelf. To find "factorial 21", which is written as 21! the calculation required is 21 x 20 x 19 x 18....and so on all the way down to ...x 3 x 2 x 1! However, with access to a scientific calculator the result for 21!can be found by first pressing the buttons for 21 followed by pressing the button labelled n!, which gives the result for 21! as 5109094217109440000 for each shelf. The result for the two shelves is 21! x 21! which is such a tremendous number that no-one could arrange books in that way if they spent their whole life at it (including from birth).
Wiki User
∙ 12y ago
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How many different ways can three books be lined up on a shelf?
6 ways
How many ways can six different books be arranged on a shelf it one of the books is a novel that must be on an end?
There are 2*5! = 240 ways.
How many different ways can 15 books be arranged vertically side by side on a shelf?
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.
How many ways can 7 different books be stacked on a shlef?
The number of ways 7 different books can be stacked on a shelf is the same as the number of permutations of 7 things taken 7 at a time, which is 7 factorial, or 5040.
How many ways can a librarian arrange 5 books on a shelf?
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How many ways can you choose 2 books from 5 on a shelf?
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.
How many different ways can you choose 5 books from a shelf containing 12 books?
792 different groups of 5 books, in 95,040 different sequences.
Put the books on the TALL shelf?
Stack the books on the shelf that is higher in height.
How many different ways can 4 different books be arranges on a shelf?
24 ways
How many different ways can three books be lined up on a shelf?
6 ways
There are seven books on the floor the number of books on the shelf is two more than three times the number of books on the floor how many books are on the shelf?
There are seven books on the floor. Let x be the number of books on the floor. The number of books on the shelf is 2 + 3x. From the information given, 3x + 2 = number of books on the shelf. Substitute x=7 into 3x + 2 to find the answer. So, there are 23 books on the shelf.
How many ways can six different books be arranged on a shelf it one of the books is a novel that must be on an end?
There are 2*5! = 240 ways.
How many ways can you arrange 5 books on a shelf order is important?
5 books can be lined up on a shelf in (5 x 4 x 3 x 2 x 1) = 120 different sequences.
What is a sentence for shelf?
my clossal shelf is full of books and toys
There are Five books on a shelf. How many different ways to arrange the books?
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
What is the collective noun for shelf?
The collective noun is a shelf of books.
How many ways can you put 5 different books on a shelf?
240. 120 ways with the books stacked verticly, and 120 ways with the books stacked horizontaly, or one on top of the other.
