Advertisements
Advertisements
प्रश्न
In an examination, there are three papers each of 100 marks. A candidate obtained 53 marks in the first and 75 marks in the second paper. How many marks must the candidate obtain in the third paper to get an overall of 70 per cent marks?
Advertisements
उत्तर
Let x be the marks of the candidate in the third paper.
Then total marks secured in all three papers = 53 + 75 + x
Total marks of three papers = 100 + 100 + 100 = 300
∴ Percentage of marks = `("Total marks secured "/"Total marks") xx 100%`
= `(53 + 75 + x)/300 xx 100%`
But it is given that, he obtained over all of 70% marks.
∴ `(53 + 75 + x)/300 xx 100 = 70`
⇒ `(128 + x)/3 = 70`
⇒ 128 + x = 210
⇒ 210 – 128
∴ x = 82
Hence, he must secure 82 marks in the third paper to get an overall of 70% marks.
APPEARS IN
संबंधित प्रश्न
Evaluate : 9.3% of 500 – 4.8% of 250 – 2.5% of 240
If 14% of a number is 315; find the number.
Out of 800 oranges, 50 are rotten. Find the percentage of good oranges.
Express the following as percent: `2/3`
A class contains 25 children, of which 6 are girls. What percentage of the class are the boys?
When 60 is subtracted from 60% of a number to give 60, the number is
Lalitha took a math test and got 35 correct and 10 incorrect answers. What was the percentage of correct answers?
The food labels given below give information about 2 types of soup: cream of tomato and sweet corn. Use these labels to answer the given questions. (All the servings are based on a 2000 calorie diet.)
| Sweet Corn | Cream of Tomato | ||
| Nutrition Facts | Nutrition Facts | ||
| Serving Size 1 cup (240ml) | Serving Size 1 cup (240ml) | ||
| About 2 serving per Container | About 2 serving per Container | ||
| Amount Per Serving | Amount Per Serving | ||
| Calories 90 | Calories from Fat 9 | Calories 100 | Calories from Fat 20 |
| % Daily Value* | % Daily Value* | ||
| Total Fat 2g | 2% | Total Fat 2g | 3% |
| Saturated Fat-0g | 0% | Saturated Fat-1.5g | 6% |
| Cholesterol 0mg | 0% | Cholesterol 10mg | 3% |
| Sodium 540mg | 22% | Sodium 690mg | 29% |
| Total Carbohydrate 17g | 6% | Total Carbohydrate 17g | 6% |
| Dietary Fibre 3 gram | 14% | Dietary Fibre 4 gram | 18% |
| Sugar 5g | Sugar 11g | ||
| Protein 3g | Protein 2g | ||
| Vitamin A 30% | Vitamin C 10% | Vitamin A 20% | Vitamin C 20% |
| Calcium 2% | Iron 6% | Calcium 0% | Iron 8% |
| *Per cent Daily Values are based on a 2,000 calorie diet. |
*Per cent Daily Values are based on a 2,000 calorie diet. |
||
Which can be measured more accurately : the total amount of fat in cream of tomato soup or the total amount of fat in sweet corn soup? Explain.
Find the value of x if 35% of ₹ x is ₹ 280.
A man travelled 60 km by car and 240 km by train. Find what per cent of total journey did he travel by car and what per cent by train?
