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Three students answer a true-false question on a test randomly. A random variable x represents the number of answers of true among the three students,

Three students answer a true-false question on a test randomly. A random variable x represents the number of answers of true among the three students, taking on the value 0, 1, 2, or 3.

(a) Find the frequency distribution for x.

(b) Find the probability distribution for x.

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