Three persons A, B, and C whose salaries together amount to ₹144,000 spend 80%, 85%, and 75% of their salaries respectively. If their savings are in the ratio 8 : 9 : 20, then what is C's salary?

If all the girls in school B and school C participated in the function, find the ratio between the number of boys in school B and school C who participated in the function.

Which of the following examples represents an inverse proportional relationship (reverse movement)?