Answer:
Answer is True. Stratified sampling.
Step-by-step explanation:
Stratified sampling is a type of sampling method that involves the division of a total population into smaller groups , which is known as strata in completing the sampling process. After this, a probability sample is drawn from each group or strata.
In this case, the 10 passengers that were randomly picked are the probability sample , while each flight where the passengers were picked are the small groups or strata.