Answer:
On average, she digs 45 plants per week
Explanation:
Here, we have the number of plants dug in every saturday for three weeks
we now want to get the average of the three weeks
We proceed to add up all what has been dug in the three weeks and divide by 3
Mathematically, that would be;
(42 + 60 + 33)/3 = 135/3 = 45