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2 answers:
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Given :
Coffee cost in a paper cup , $1.50 .
Coffee cost in a cremic mug , $6 .
Refills of the ceramic mug are $1 .
To Find :
How many refills do you need to buy to make buying the mug a better value
then buying individual paper cups of coffee.
Solution :
Let , number of fills to make mug better option is x .
So , money spend in mug in greater than paper cup .
Therefore , after 12 cups of coffee, ceramic mug will have better value than paper cups .
Hence , this is the required solution .
