To state: The numbers of ways in which five books can be arranged from left to right on a bookshelf.
The resultant answer is 120 ways.
Given information:
Five books have to be arranged from left to right on a bookshelf.
Explanation:
Number of books is: 5
Any of the 5 books can be placed to the left side. Thus there are 5 ways in which a book can be placed to the left.
Now 4 books are remaining, the second book can be placed to the right of the first book in 4 ways.
Now 3 books are remaining, the third book can be placed to the right of the second book in 3 ways.
Now 2 books are remaining, the fourth book can be placed to the right of the third book in 2 ways.
At last there is 1 book left it can be placed to the right of the fourth book in 1 way.
The number of ways is:
Therefore, there are 120 ways in which five books can be arranged from left to right on a bookshelf.
Chapter 9 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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