Question: 4.31 A multiple-choice question on a test has five answers. If Dianne chooses one answer based on pure guess, what is the probability that her

4.31 A multiple-choice question on a test has five answers. If Dianne chooses one answer based on “pure guess,” what is the probability that her answer is

a. correct?

b. wrong?

Do these two probabilities add up to 1.0? If yes, why?

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