Consider the following table: MarksNumber of Students1-10 2 11-20 4 21 -30 6 31 -40 3 41 – 50 3 51 -60 2The percentage of students obtaining marks more than 10 but less than or equal to 40 will be

The correct answer is (b).

The percentage of students obtaining marks more than 10 but less than or equal to 40 is the number of students obtaining marks in the range 11-40 divided by the total number of students, multiplied by 100. This is equal to $\frac{4+6+3}{15} \times 100 = 65\%$.

Option (a) is incorrect because it is the percentage of students obtaining marks less than or equal to 10. Option (c) is incorrect because it is the percentage of students obtaining marks in the range 21-40. Option (d) is incorrect because it is the percentage of students obtaining marks in the range 31-40.