and now u would just cross multiply and solve for x (the cost of 10 notebooks)
The answer is 6.6$
Firstly, you have to realize that the cost of a notebook is directly proportional to the amount of notebook you want.
So, the relation is:
x=total cost of notebooks
y=amount of notebooks
Where k is a constant
Therefore, the cost of 10 notebooks is:
Let z=total cost of 10 notebooks
For 3 notebooks you pay $1.98 so the ratio is 1:0.66.
For 10 notebooks, then we could scale the ratio and it will become 10:6.60. So they will cost you $6.60.
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