यदि 24, 40, 33 और 57 में से प्रत्येक से x घटाया जाता है, तो इस प्रकार प्राप्त संख्याएँ समानुपात में होती हैं। (5x + 12) का (4x + 15) से अनुपात क्या है?

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)?