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?
Answer & explanation
Correct answer: option 4
Number of students scored at least 30 marks but less than 40 marks
= 8 - 6
= 2