Considering that the server with the least bills had 20 of them, the relative frequency was of 0.1274.
A relative frequency is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, out of a total of 157 bills, the server with the least bills had 20 of them, hence:
f = 20/157 = 0.1274.
The relative frequency of the server with the least bills was of 0.1274.
More can be learned about relative frequencies at https://brainly.com/question/23359601