Answers

2015-12-24T19:44:20+05:30
No.of defective bulbs out of 10 bulbs = 1
The ratio of defective bulbs to the total no.of bulbs = 1:10
Total no.of bulbs produced = 630
Let the no.of defective bulbs be x
Then the ratio is x:630
Now 1:10 = x:630
⇒10x =630
⇒ x = 630/10
∴ x = 63
∴The no.of defective bulbs = 63 
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2015-12-24T19:54:45+05:30
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