Hi,

You have 2 science books, 3 language books, and 4 philosophy books. 

In how many ways can they be arranged on the shelf 

if all books of the same subject are to be together? 



The idea is: if books of same subject are to be together...

Then... how many ways can 3 'units' to be arranged:  

RELATED QUESTIONS

A bookshelf has 10 books, including 3 math books, 4 science books, and 3 history books.... (answered by greenestamps)

2 math books,4 science books and 3 literature books are to be arranged on a shelf. In how  (answered by math_helper,ikleyn)

There are 4 different mathematics books and 5 different science books in how many ways... (answered by ikleyn)

How many ways can a 2 Physics books, 4 Mathematics books and 3 Chemistry books be... (answered by ikleyn)

Any help would be so appreciated. Thank you.

10 books are to be arranged on a shelf. 4  (answered by josmiceli)

There are 8 Physics books, 4 calculus books, 7 us history textbooks, and 3 resource books  (answered by stanbon)

In how many ways can 4 different Math books, 5 different History books, and 2 different... (answered by Boreal)

In how many ways can 4 different Math books, 5 different History books, and 2 different... (answered by greenestamps)

A student has room for six books on a shelf near his study area. The books are a... (answered by ewatrrr)