Answer:
Relative frequecy approach
Step-by-step explanation:
The classical approach is when all events have the same probability, for example, a coin landing head or tails.
The relative frequency is when it is calculated after some data has been formed after a sample. This is what happened here. The economist surveyed some people, and formed these probabilities.
The subjective probability approach contains no data, just opinion from the past, or past experiences, for example