#### SweetDee93

##### New member

- Joined
- Jul 9, 2019

- Messages
- 3

I am working on weighted averages and I am not sure how to translate part of my question into a formula to solve...

A motorist purchases gas as follows:

56 litres at 0.99/litre

64 litres at 1.065/litre

54 litres at 1.045/litre

I have already solved for the average number of litres of gas purchased, as well as the average cost per litre. The next question is if you average 8.75km per litre, what is the average cost of gasoline per km?

I'm not asking for anyone to solve it for me... I just want to know what I do with this information in order to solve it... Thanks!