RPH Editorial Board Solutions for Exercise 1: MULTIPLE CHOICE QUESTIONS

A discount series of $10\%$, $20\%$ and $40\%$ is equal to a single discount of:

An umbrella marked at $Rs.80$ is sold for $Rs.68$. The rate of discount is:

A reduction of $20\%$ in the price of mangoes enables a person to purchase $12$more for $Rs.15$ The price of $16$ mangoes before reduction was:

Tarun bought a TV with $20\%$ discount on the labeled price. Had he bought it with $25\%$ discount, he would have saved  $Rs.500$.  At what price did he buy the TV?

If a commission of $10\%$ is given on the marked price of a book, the publisher gains $20\%$. Find his gain precentage if the commission is increased to $15\%$?

There would be $10\%$ loss if rice is sold at $5.40$ per $kg$. At what price per kg should it be sold to earn a profit of $20\%$? 

A merchant sold two cows for $Rs.8400$ and $Rs.8800$, respectively. If he earns profit of $20\%$  on the first and $10\%$ on the second, his total profit is:

By selling an article for $₹4080$ a man loss $15\%$. The cost price of the article is: