The table above shows the frequency distribution of the ages (in years) of pupils in a certain secondary school. What percentage of the total number of pupils is over 15 years but less than 21 years?
Attached Figure / Diagram
A
35%
B
45%
C
50%
D
60%
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
% of those above 15 but less than 21 years
age = \(\frac{25}{50}\) x \(\frac{100}{1}\)
= 50%
Source: Myschool Past Questions Archive (Record #10420)