SOLUTION: A student has room for six books on a shelf near his study area. The books are a dictionary and textbooks of chemistry, english, history, mathematics, and philosophy. In how many w

Algebra ->  Permutations -> SOLUTION: A student has room for six books on a shelf near his study area. The books are a dictionary and textbooks of chemistry, english, history, mathematics, and philosophy. In how many w      Log On

Hi
Consider the math and philosophy books as one unit.  
As one unit they can be arranged 2 ways:

 How many ways to arrange the 6 books: (2)5! = 240 ways  
Or
 2*P(5,5) = 240
Wish You the Best in your Studies.