Definition of the complement of an event

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Use the definition of the complement of an event to find the given probability.

1. A multiple-choice question has four possible answer choices (A, B, C, or D), one of which is correct. Suppose that an unprepared student does not read the question, but simply makes a random guess for the question. What is the probability that the student will guess incorrectly?

2. A box contains 30 identical-looking items of which 3 are defective. If one item is selected at random, what is the probability that the item is not defective?

Reference no: EM131870126

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