Geometry

Question Analysis
This question involves analyzing a three-level tree diagram to calculate a specific joint probability.
The main focus is tracing the complete path through multiple decision points to arrive at the final probability.

Key Concept Explanation
Multi-stage probability requires multiplying probabilities along the entire path
Conditional probabilities change at each decision point
Irrelevant branches can be ignored for the specific question asked

Step-by-Step Solution
Trace the complete path for Plain T-shirt:
Firs...