Definition of a Tree: A tree is a woody plant with erect perennial trunk of at least 3.5 inches (7.5 centimeters) in diameter at breast height (4feet or 1.3 meters), a definitely formed crown of foliage, and a height of at least 13 feet (4 meters).
The Auborn Society Field Guide to North American Trees.
This chapter introduces fundamental concepts of probability theory; events, and their chances. For the readers who are familiar with elementary probability it may be refreshing to see the computer used for counting elementary events, and randomization used to solve a deterministic optimization problem.
The questions are