A factory produces electric bulbs. If $1$ out of every $10$ bulbs is defective and the factory produces $630$ bulbs per day, find the total number of defective bulbs produced each day.

Which ratio is larger in the following pairs:

$3:4$ or $9:16$

Which ratio is larger in the following pair(write in fractional form):

$5:12$ or $17:30$

Which ratio is larger in the following pair(write in fractional form):

$3:7$ or $4:9$

Which ratio is larger in the following pairs:

$1:2$ or $13:27$

The ratio of the income to the saving of a family is $11:2$. The expenditure is $₹k$ and the saving is $₹760$. Find $k$.