In an examination, 20 questions of true false type are asked. Suppose a student
tosses a fair coin to determine his answer to each question. If the coin falls
heads, he answers 'true', if it falls tails, he answers 'false'. Find the probability
that he answers at least 12 questions correctly.
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In an examination, 20 questions of true false type are asked. Suppose a student
tosses a fair coin to determine his answer to each question. If the coin falls
heads, he answers 'true', if it falls tails, he answers 'false'. Find the probability
that he answers at least 12 questions correctly.
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