The table below provides information about the marks obtained by a group of students in a test.
| Marks | No. of students |
| Less than 10 | 2 |
| Less than 20 | 5 |
| Less than 30 | 6 |
| Less than 40 | 8 |
| Less than 50 | 10 |
How many students scored at least 30 marks but less than 40 marks in the test?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 2
Total number of students who scored less than 30 marks = 6
Total number of students who scored less than 40 marks = 8
Thus, the number of students who have scored atleast 30 but less than 40 marks = 8 - 6 = 2