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How many different ways can you arrange 5 out of 7 books on a book shelf?
Wiki User
∙ 12y ago
There are only 5 places on the shelf. You have 7 books to choose from. We will ignore the order of the books on the shelf. The first place can be filled from a choice of 7 books, the next place from 6, the next place from 5, the next from 4, and the last of the 5 places from 3 books.
So the number of ways of choosing the 5 is found from 7 * 6 * 5 * 4 * 3 = 2520
Wiki User
∙ 12y ago
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9 In how many different ways can you arrange 7 books on a shelf?
Consider one placement at a time. The first book on the shelf could be any of seven. The second could be any of the remaining six. This continues with the rest. The total combinations are: 7! = 7*6*5*4*3*2*1 = 5040
How many ways can you choose 2 books from the 6 on the shelf?
20, without replacing the first book chosen. 25 with replacing it.
How many ways can 6 different books be stacked on a shelf?
First book can go in any of 6 places, second in any of the 5 remaining and so on until fifth book has 2 options. There are therefore 6 x 5 x 4 x 3 x 2 ie 720 possible arrangements.
How many ways can 9 books be arranged on a shelf so that 5 of the books are always together?
You can simplify the problem by considering it as two different problems. The first involves consider the five-book chunk as a single book, and calculating the permutations there. The second involves the permutations of the books within the five-book block. Multiplying these together gives you the total permutations. Permutations of five objects is 5!, five gives 5!, so the total permutations are: 5!5! = 5*5*4*4*3*3*2*2 = 263252 = 14,400 permutations
How many ways can 9 books be arranged on a shelf?
Assuming that each of the nine books is unique, that there are only nine positions open on the given shelf, and that each book can fit in each position, the answer is 9! (nine factorial) which is equal to 362,880. If the nine books are not all unique (i.e. there are two of the same book), the number should decrease taking into effect that reversing the positions of the identical books makes no overall change. If there is one additional position, the number should increase to 10! or 3,628,800. If there is more than one additional position, the number will still increase, but not to 11! or 12! since both open spaces are reversible just like the identical books.
Why is it harder for us to arrange books vertically straighter in a book shelf and why do books go slanted?
because of gravity. i think
9 In how many different ways can you arrange 7 books on a shelf?
Consider one placement at a time. The first book on the shelf could be any of seven. The second could be any of the remaining six. This continues with the rest. The total combinations are: 7! = 7*6*5*4*3*2*1 = 5040
What is the best way for books to be stored?
A book shelf.
How many ways can you arrange 2 books on a boos shelf?
2. If the books are x and y, then xy or yx are the only possible ways. Unless you allow for one book to the side of the other, one bok on top of the other, one book leaning partially on the other, etc. In that case, there are an infinite number of ways.
Which is correct - 'was a few' or 'were a few'?
Were. There were a few books on the shelf. Was - is singular. There was one book.
What is the probability of five books being placed in alphabetical order of their titles if randomly put on a book shelf?
There are 5! (that is, 120) distinct ways to arrange five items. Only 1 of them will have the books in alphabetical order by title. So the probability that it happens by random is 1/120.
What is collective noun for book?
The collective nouns for books are:a stack of booksa shelf of booksa library of books.
How do you transfer files from one place to another in your NOOK color?
First you need to create separate shelves for your books (i.e. horror, romance, mystery, already read, etc.). Then, go to each shelf and touch the "edit" button. This will bring up a list of all your books. Go to each book you want on each specific shelf (i.e. say you're putting mystery books on your "mystery shelf", touch the "edit" button, touch the screen next to the book and that creates a check mark. Once finished for one shelf, press "save". Your books for that shelf are now saved onto that "shelf". Continue this for all your books. To move books from one shelf to another, again go to the shelf you want to remove it from, hit "edit", find the book title, touch the checked-marked box which will remove it from that shelf, touch "save" to ensure that it's removed from that shelf. Go to the shelf you want that book to go and repeat the process ("edit, put a check mark next to the book title, "save") and your done.
How many ways can you arrange 3 geometry books and 4 algebra books on a shelf?
If the different books of the same type are considered to be the same, so that different arrangements of the same type of book are not considered to be different variations in the answer, then to find the different arrangements of books simply multiply 3 X 4 to find the answer 12. If each book must be placed as a separate entity (each book is completely different and the books must all be arranged separately) then the answer is 7! (seven factorial), or 7 x 6 x 5 x 4 x 3 x 2 x 1. The answer in this case is 5040. Examples: Answer 12: GGGAAAA AGGGAAA AAGGGAA AAAGGGA AAAAGGG Etc. Answer 5040: (Each number represents a different book. 4 are Algebra and 3 are Geometry, but all the books must be placed seperatly, so that makes no difference.) 1234567 7654321 7234561 7634512 Etc.
What does the iPad do that the iPhone does not?
a lager viewing screen and a virtual book shelf with realistic books
How do you move the books on shrink ray island?
you climb the book shelf at the top left coner you push a book down onto the books happy yes/no
How many ways can you arrange 4 out of 8 books on a shelf?
There are 8 ways to choose the first book There are 7 ways to choose the second book - 8 x 7 = 56 ways to select two books There are 6 ways to choose the third book - 8 x 7 x 6 = 336 way to select three books There are 5 ways to choose the fourth book - 8 x 7 x 6 x 5 = 1,680 ways to select four books.
