IMAT 2015 Q19 [Fuel Consumption]

Deanna keeps a record of the petrol she puts into her car and the current distance it has covered so she can estimate her fuel consumption. When she puts petrol in, sometimes the tank is filled completely and she marks ‘FULL’ beside the entry if this is so, otherwise the tank is only partly filled.

Her data for the last month is as follows:

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Which one of the following is the best estimate of her fuel consumption?

A. 9.9 litres / 100 km
B. 7.7 litres / 100 km
C. 1.7 litres / 100 km
D. 6.8 litres / 100 km
E. 8.0 litres / 100 km