Question
The marks of a student were entered as 88 instead of 68.
Due to this, the average marks of the class increased by 0.5. What is the number of students in the class?Solution
To find the number of students n: The error increased total marks by 88-68 = 20. This caused an average increase of 0.5 marks per student. ATQ- 0.5× n = 20. n= 20/0.5 = 40. Thus, the number of students is 40
By selling 8 pens for ₹80, a shopkeeper loses 20%. How many pens should he sell for ₹248 to earn a 24% profit?
A trader advertises that he sells sugar at cost price but uses a false weight where ‘N’ grams is shown as 1 kilogram. If he earns a profit of 25% pe...
A fruit vendor purchased oranges at Rs. 180 per dozen and sold them for Rs. 18 each. He managed to sell 10 dozen oranges. Calculate the total profit he ...
A merchant sets the price of an item Rs. 6,000 higher than its original cost and offers a discount of 16(2/3) %. As a result, the merchant makes a 25% p...
- The cost price and marked price of a bag are in the ratio of 4:9. If the bag is sold at a 30% discount, the shopkeeper makes a profit of Rs. 180. Determine...
A trader marks an article at Rs 1,000. He allows a discount of 10% and still makes a profit of 20% on the cost price. Find the cost price of the article.
The cost price of two articles is same. One article is sold at 20% profit and another at 10% loss. If the selling price of one article is Rs. 999 more t...
Ratio of MP and SP of an article is 8:5 and the article is sold at 25% profit. Find cost price of article, if the selling price is 200 more than its CP?
A shopkeeper marked an article 60% above its cost price and made a profit of Rs. 192 when he sold the article after giving a discount of 30%. Find the p...
A sells an article to B at a profit of 20% and B sells it to C at a profit of 20%. If C pays ₹504 for it, what was the cost price for A?
