Sonja has 1/6 fiction books, 1/3 nature books, and 12 mystery books. How many books does she have in all?
hmmm, there is some missing information here I think
That is what I thought too...I was trying to help my cousin, but that is all the information that was on their worksheet.
well, maybe not.
ok so let's set this up
if the total number of books is X, then we know that 1/6x are fiction, 1/3x are nature, and 12 are mystery
so 1/6x + 1/3x + 12 = X
so 12 = x - 1/6x - 1/3x or 12 = 1/2x so x = 12/.5 = 24
so the total number of books is 24, and precisely 12 mystery, 4 fiction and 8 nature
no problem! the key assumption is that , that's all the types of books there are
the reason it works is they basically tell you that half the books are mystery , since if 1 - 1/3 - 1/6 = 1/2
Join our real-time social learning platform and learn together with your friends!