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A factory produces electric bulbs and 2 out of every 15 bulbs are defective. If the factory produces 630 bulbs per day, then the number of defective bulbs produced per day is
The fraction of defective bulbs is $$\frac{2}{15}$$. So the number of defective bulbs per day is $$\frac{2}{15} \times 630 = 84$$.
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