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Carla is trying to pass a competency exam. Each time she takes the exam she has a 25% chance of passing, and she is allowed

Carla is trying to pass a competency exam. Each time she takes the exam she has a 25% chance of passing, and she is allowed a maximum of two attempts. Draw a tree diagram to represent her attempts to pass the exam. Answer the following questions.

(a) How many outcomes does your tree show? (b) What is the probability she will eventually pass the exam? (c) What is the probability she will take the exam twice?

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