IT. A 35-cm line segment is divided into two parts in the
12. A factory produces electric bulbs. If 1 out of every 10 bulbs is defective and the factory
produces 630 bulbs per day, find the number of defective bulbs produced each day.
13. Find the ratio of the price of a pencil to that of a ball pen if pencils cost 96 per score and
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A factory produces 1 defective bulb out of every 10. Thus the probabilty of producing a defective bulb is 0.1
Total bulbs it produces are 630.
Hence the defective bulbs are 0.1×630=63
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