Stage: 4 Challenge Level: 
Suppose the game only lasted for a maximum of three tosses, then the game's lost, what's the most you could win, how often would that happen, and what would you expect the average winnings to be over many games?
Tree diagrams. Combining probabilities. Real world. Equally likely outcomes. Theoretical probability. Quadratic equations. Long problems. Conditional probability. Random variables. Experimental probability.
Published November 2005,December 2005.
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