If the patient smoked 548 packs of cigarettes per year, how many packs did she smoke in an average day?

First we must know the conversion from years to days.

For this case we have the following conversion:

1 year = 365 days

Therefore, the average per day is given by:

(548) * (1/365) = 1.50 packs / day

Answer:

she smoked 1.50 packs in an average day