Answer: Random sampling method.
Explanation:
A random sampling is a sampling technique in which a researcher randomly picks participants for the sample such that the chances for each participants to get selected is equal.
Given : In a study, the sample is chosen by putting people's names on a dartboard, and blindly throwing darts to select 5 names.
Here , the probability to throw dart on any any name is equal because they throwing it blindly.
Thus, this sampling method is a random sampling method.