Question
Question: Eleven books consisting of 5 Mathematics, 4 Physics and 2 Chemistry are placed on a shelf. The numbe...
Eleven books consisting of 5 Mathematics, 4 Physics and 2 Chemistry are placed on a shelf. The number of possible ways of arranging them on the assumption that the books of the same subject are all together is.
A
4! 2!
B
11!
C
5! 4! 3! 2!
D
None of these
Answer
5! 4! 3! 2!
Explanation
Solution
Possible ways = 5!.4!.3!.2!.