दो संख्याएँ 7 : 8 के अनुपात में हैं। यदि दोनों संख्याओं के बीच का अंतर 30 है, तो संख्याएँ ज्ञात कीजिए।

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)?