juice box=82 regular
63 soda +63 regular
124 large total
40 is the final : )
Probability sampling means that each unit in population has an equal chance or probability of selection in a sample.
Cluster sampling is a probability sampling method because population is divided into clusters at random and no personal judgement is involved. Thus, each cluster has equal probability of selecting and sampling is done as random. Hence, cluster sampling is a probability sampling method.