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Final answer:
Explanation of calculating the probability of passing a true-false quiz with a 70% grade.
Explanation:
To calculate the probability of passing the true-false quiz with at least 70%, we consider that the student guesses randomly at each question. In a 10-question quiz, the probability of guessing correctly on one question is 0.5. Using this, we can find the overall probability of passing the test with at least a 70% grade.
Learn more about Probability Calculation here:
https://brainly.com/question/33594301
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