In a class of 30 students, the marks scored in an examination are displayed in the histogram. What percentage of the student scored more than 40%?
Attached Figure / Diagram
A
14%
B
40%
C
46\(\frac{3}{4}\)%
D
53\(\frac{1}{3}\)%
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
This histogram is transferred into this frequency table
\(\begin{array}{c|c} Marks & 20 & 40 & 60 & 80 & 100 \\ \hline students & 9 & 7 & 6 & 6 & 2\end{array}\)
Students who scored more than 40 = 6 + 6 + 2 = 14
i.e. \(\frac{14}{30}\) x 100% = 46\(\frac{3}{4}\)%
Source: WAEC / JAMB / NECO Classroom Archive (Record #32905)