In how many ways can 3 novels, 2 mathematics
books, and 1 chemistry book be arranged on a
bookshelf if

Question

In how many ways can 3 novels, 2 mathematics
books, and 1 chemistry book be arranged on a
bookshelf if

usukidoll · Answer

(a) the books can be arranged in any order?
Since there aren't any restrictions, we have 3+2+1=6! = 720 possible arrangements.
(b) the mathematics books must be together and
the novels must be together?
The Math books are bundled so it's 2!
The novels are bundled so it's 3! And since we have three objects: math, novel, and chemistry book, we have 2!3!3!=72
(c) the novels must be together, but the other
books can be arranged in any order?

usukidoll · Answer

I don't understand the last part though since we have a bundle of novels and that's 3! but that's all I can get out of this

usukidoll · Answer

@ganeshie8

ganeshie8 · Answer

Let's put all the novels in a bag  : 

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ganeshie8 · Answer

Also, we have 2M and 1 Chemistry book :

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