792 different groups of 5 books, in 95,040 different sequences.
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
20, without replacing the first book chosen. 25 with replacing it.
5 books can be lined up on a shelf in (5 x 4 x 3 x 2 x 1) = 120 different sequences.
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.
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.
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
Stack the books on the shelf that is higher in height.
24 ways
6 ways
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.
20, without replacing the first book chosen. 25 with replacing it.
There are 2*5! = 240 ways.
You might choose a high-density fiberboard (HDF) or medium-density fiberboard (MDF) for a long shelf for heavy books. These boards are known for their stability and strength, making them suitable for supporting the weight of heavy items like books. Additionally, MDF and HDF are typically more affordable than solid wood options.
Choose 3 then 2 then 1; 3*2*1 = 6 ways.
5 books can be lined up on a shelf in (5 x 4 x 3 x 2 x 1) = 120 different sequences.
my clossal shelf is full of books and toys