Question

There are three different lots of Mathematics, Physics and Chemistry books arranged in three different lots as shown in the following diagram

In how many distinct ways we can pile up these 12 books such that at time of pilling up all these books in a single lot we always pickup the book from the top of respective lots

• A. $\frac{12 !}{3 ! \times 5 !}$
• B. $\frac{12 !}{4 ! \times 5 !}$
• C. $\frac{12 !}{3 ! \times 4 ! \times 5 !}$
• D. $\frac{12 !}{3 ! \times 4 !}$

Answer 1

Answer: (C)

Correct answer is (c) $\frac{12 !}{3 ! \times 4 ! \times 5 !}$