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A quality control manager of a factory finds 10 imperfect screws out of every 100 screws produced. At this rate, how many screws will be imperfect if the factory produces 20,000 screws ?

$\begin{array}{1 1} (a)\; 200 \\ (b)\; 2000 \\ (c)\; 10,000 \\ (d)\; 15,000 \end{array}$

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