A weather forecaster estimates there is a $70\%$ chance of rain tomorrow based on her experience and current weather patterns. What type of probability is this, and why?

• A. Classical probability, because it is based on equally likely outcomes.
• B. Empirical probability, because it is based on past data.
• C. Subjective probability, because it is based on personal judgment.
• D. Classical probability, because it is calculated mathematically.

Answer: (C)