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We have 50 pieces of underwear, 20 of which are red, and 30 are blue. What needs to be done to calculate the percentage of red underwear out of the total?
A: Divide the total number by two. B: Subtract the number of blue underwear from the total and multiply by two. C: Divide the number of red underwear by the total and multiply by one hundred. D: Add the sum of red and blue underwear to the total, divide by two, and subtract ten.
"Three out of four answers lead to the same result, haha. Of course, only one algorithm is correct, but it's funny. And he also likes to come up with tough questions, sometimes about Creedar, sometimes about Rafik, sometimes about Rinze..."
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