WAEC Mathematics 1994 Question 46

The table shows the masses to the nearest kilogram, of 40 students in a university.
Mass(kg): 65, 66, 67, 68, 69, 70
No. of Students: 4, 5, 11, 8, 7, 5
The percentage of the students with mass less than 69kg is

1. A.56%
2. B.62.5%
3. C.68%
4. D.70%
5. E.87.5%