Following table gives frequency distribution of marks of 70 students in a class test: Marks obtained No. of students 30 – 34.5 5 35-39.5 10 40-44.5 15 45 – 49.5 30 50 – 54.5 555 – 60.0 5Find what percentage of students secured 40 or more marks.

The correct answer is (c) 73.64%.

The number of students who secured 40 or more marks is 15 + 30 = 45.
The percentage of students who secured 40 or more marks is 45/70 * 100 = 73.64%.

Option (a) is incorrect because it is the total number of students in the class.
Option (b) is incorrect because it is the percentage of students who secured 35 or more marks.
Option (d) is incorrect because it is the percentage of students who secured 50 or more marks.