Johnston, Elgin. (2020). Probability. In S. Bowen (Ed.), Math Circle Activity Database. American Institute of Mathematics.


Math Circles:
Some probability problems can be solved by drawing a picture; this approach is sometimes called geometric probability. Other approaches can include experimentation, looking at smaller cases, looking at extreme cases, recursion, or carefully listing possibilities. This session includes ten problems that can be explored alone or in sets, providing material for several circle sessions or the classroom.

Activity Guide

This guide looks at the activity in detail and goes into the underlying math.