PRACTICE QUESTIONS CLASSROOM WING

If $x\%$ of $25$ is equal to $y\%$ of $15$ and $y\%$ of $15$ is equal to $25\%$ of $20$, then find the value of $x$.

Rohan and Sohan earn salaries which are in the ratio of $3:4$ respectivley. Sohan saves $11\%$ of his salary and Rohan saves $18\%$ of his salary. If Sohan saves $₹ 2310$, then find the savings of Rohan.

Rohan and Sohan earn salaries which are in the ratio of $3:4$ respectivley. Sohan saves $11\%$ of his salary and Rohan saves $18\%$ of his salary. If Sohan saves $₹ 2310$, then find the sum of the salaries of both.

A total of $1100$ votes were polled in a school election for school head boy. Among three contestants, the first secured $25\%$ votes more than the second and the third secured $300$ votes less than the first. By what percent of votes was the third contestants defeated by the first contestants$?$

A basket contains apples, guavas and oranges. The number of guavas is $60\%$ more than that of apples and the number of oranges is $12.5\%$ less than that of guavas. If the total number of these fruits is $80$, then find the number of oranges.

The price of a refrigerator, $P$ is $5$ times that of a cooler $Q$. If the price of $P$ increases by $20\%$ and that of $Q$ decreases by $40\%$, then what is the change in the total price of the refrigerator and cooler put together$?$

Raju gave $20\%$ of his income to his daughter, $40\%$ of the remaining to his first son, $30\%$ of the remaining to his second son, and finally, the remaining, $₹ 12600$ was donated to a charitable trust. Find Raju's income.

A shopkeeper sold certain articles. Cost price of each article and the number of articles sold are given below.

Calculate the cost of living index for the year $2006$ taking $1996$ as the base year (approximately).