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21. Ravi obtained 70 and 75 marks in first two unit test. Find the minimum markshe should get in the third test to have an average of at least 60 marks. 22. To receive Grade ' ' in a course, one must obtain an average of 90 marks or more in five examinations (each of 100 marks). If Sunita's marks in first four examinations are 87,92,94 and 95, find minimum marks that Sunita must obtain in fifth examination to get grade ' ' in the course. 23. Find all pairs of consecutive odd positive integers both of which are smaller than 10 such that their sum is more than 24. Find all pairs of consecutive even positive integers, both of which are larger than 5 such that their sum is less than 23 .
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| Question Text | 21. Ravi obtained 70 and 75 marks in first two unit test. Find the minimum markshe should get in the third test to have an average of at least 60 marks.
22. To receive Grade ' ' in a course, one must obtain an average of 90 marks or more in five examinations (each of 100 marks). If Sunita's marks in first four examinations are 87,92,94 and 95, find minimum marks that Sunita must obtain in fifth examination to get grade ' ' in the course.
23. Find all pairs of consecutive odd positive integers both of which are smaller than 10 such that their sum is more than
24. Find all pairs of consecutive even positive integers, both of which are larger than 5 such that their sum is less than 23 .
|
| Updated On | Nov 12, 2022 |
| Topic | Coordinate Geometry |
| Subject | Mathematics |
| Class | Class 10 |
| Answer Type | Video solution: 3 |
| Upvotes | 366 |
| Avg. Video Duration | 5 min |
