The cumulative frequency curve represents the ages of ages of students in a school. What age group do 70% of the students belongs?
Attached Figure / Diagram
A
17.5 - 20.5
B
16.5 - 19.5
C
15.5 - 19.5
D
15.5 - 18.5
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
If the total number of students represents 100%, then 70% corresponds to the point on the graph where the cumulative frequency reaches 70
From the graph, find where the cumulative frequency line intersects the 70% mark. This typically corresponds to a specific age on the X-axis
Source: WAEC / JAMB / NECO Classroom Archive (Record #33094)