A science teacher presented a balloon to her class, and posed the question, "If I keep this balloon in the freezer overnight, what will occur?" She followed up with, "How certain are you of your answer?" The teacher recorded her students' responses. Shrink Expand Certain Uncertain 4 5 4 What is the probability that a randomly selected student was certain and believes the balloon wil expand? Simplify any fractions. Submit

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A:

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A:

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