L Mohan Lal Solutions for Exercise 1: PREVIOUS QUESTIONS

The ratio of cost price of two articles is $2:3.$ The profit on them is $10\%$ and $20\%$ respectively. What is the overall profit percentage on selling these two items?

The total cost of $8$ pens and $10$ erasers is $Rs.136$ The total cost of $20$ pens and $10$ erasers is $Rs.256$. What is the cost of a pen?

A man bought a total of $200$ oranges and apples for $Rs. 450$. If the cost per orange is $Rs.2.70$ and the cost per apple is $Rs.1.50$, then find the number of oranges and apples be bought.

If the price of petrol increases by $20\%$. Abhi intends to spend only an additional $10\%$ on petrol. By how much percentage will reduce the quality of petrol purchased?

Uma got $35\%$ of the total marks in an examination and failed by $30$ marks. Mahesh, who took the same examination and $60\%$ of the total marks and $20$ marks more then the pass marks. What was the passing marks in the examination?

If in selling a product, the profit received is $40\%$ of its selling price, what is the percentage of profit on the cost price?

A merchant buys two articles for $₹880$. He sells one of them at a profit of $30\%$ and the other at a loss of $10\%$ and makes no profit or loss at the end. What is the selling price of the article that he sold at a profit?

A merchant sells an article for $Rs.1500$. In the process be made $25\%$ loss. What was the cost price of the product?