In a test comprising 200 questions, four marks are awarded for every question answered correctly. The number of marks deducted for every question answered wrongly and for question left unattempted is 2 and 1 respectively. If a student got 80 marks in the test, then which of the following cannot be the number of questions solved wrongly by the students?
Let the number of questions solved correctly be x Number of questions solved wrongly = y Number of questions left not attempted =z `x+y+z=200` …………… (i) `4x-2y-z=80` …………… (ii) Adding eq (i) and (ii), we get x = `(280+y)/5` Only, y = 120, will give an integer value of x .
A seller marked his article 60% above the cost price and sold it after offering two successive discounts of 50% and 20% respectively. In the whole trans...
'S' purchased two bags of rice for a total of Rs. 2,000. He sold one of the bags at a profit of 32%, and the other at a loss of 12%. If the overall prof...
A trader bought some orange at 7 for Rs 11. He sold all at 2 for Rs 3. Thereby he losses Rs 30. Find number of oranges sold.
The ratio of cost price and selling price of a shirt is 7:8 respectively. The shirt was marked up by 25% above its cost price, and sold after giving Rs....
Even after allowing a discount of 40% on the marked price, a shopkeeper earns 50 % profit. By what percentage has the marked price been marked up above ...
By selling two articles for Rs.800, a person gains the cost price of 5 articles. The profit percent is.
A and B started a business with investments in the ratio 11:10 respectively. After 10 months, C joined them with an investment 40% more than the investm...
A shopkeeper marked an article 65% above its cost price and made a profit of Rs. 644 when he sold the article after giving a discount of 15%. Find the p...
Profit percentage received on a product when sold for Rs. 800 is equal to the percentage loss incurred when the same product is sold for Rs. 400. Find t...
B purchased 15 kg apples at the rate of 180 per kg from a wholesaler who uses a weight of 900 grams for the kg weight. B sold all these apples at 180 pe...