Question

A factory produces electric bulbs .if 1 out if every 10 bulb is defective.the factory produces 630 bulbs per day. Find number of defective bulbs.

Answer 1

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 

Answer 2

Answer:

the number of defective balls =63