SOLUTION: in how many ways can 3 maths books,4 history books,3 chemistry books & 2 bio books can be arrranged on a shelf so that all books of the same subjects are together?

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Question 903681: in how many ways can 3 maths books,4 history books,3 chemistry books & 2 bio books can be arrranged on a shelf so that all books of the same subjects are together?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
same subjects together: four Groups
4!