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The ratio of the number of mystery books to the number of science fiction books is 4 : 3. The ratio of the number of science fiction books to the number of biographies is 4 : 5. If there are 48 science fiction books, find the total number of books.

User Tobius
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4:3
Mystery Books:Science Fiction Books(48)

48 divided by 3 = 16
16 multiplied by 4= 64
There are 64 Mystery Books.

4:5
Science Books(48):Biographies

48 divided by 4 = 12
12 multiplied by 5 = 60
The are 60 Biographies

Mystery Books 64
Science Fiction books 48
Biographies +60
------
172

I hope that helped!
User Xfze
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