Using Tree Diagrams to Represent a Sample Space. Imagine that a family decides to play a game each night. They all agree to use a tetrahedral die (i.e.,

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Presentation transcript:

Using Tree Diagrams to Represent a Sample Space

Imagine that a family decides to play a game each night. They all agree to use a tetrahedral die (i.e., a four-sided pyramidal die where each of four possible outcomes is equally) each night to randomly determine if they will play a board game (B) or a card game (C). The tree diagram mapping the possible overall outcomes over two consecutive nights will be developed below. To make a tree diagram, first present all possibilities for the first stage. (In this case, Monday.)

Note: If the situation has more than two stages, this process would be repeated until all stages have been presented. – If BB represents two straight nights of board games, what does CB represent? – List the outcomes where exactly one board game is played over two days. How many outcomes were there?

Calculate the probability of CB and CC What is the probability that there will be exactly one night of board games over the two nights?

Closing In a laboratory experiment, two mice will be placed in a simple maze with one decision point where a mouse can turn either left (L) or right (R). When the first mouse arrives at the decision point, the direction it chooses is recorded. Then, the process is repeated for the second mouse. 1. Draw a tree diagram where the first stage represents the decision made by the first mouse, and the second stage represents the decision made by the second mouse. Determine all four possible decision outcomes for the two mice.