The data below shows the frequency distribution
of marks scored by a group of students in a class
test.
Find the mean mark.
Attached Figure / Diagram
A
1
B
1.3
C
2
D
3
E
3.8
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
Mean(x) = \(\frac{ ∑fx}{ ∑f}\)
Mean(x) = \(\frac{ 2 \times 2 + 3 \times 4 + 5 \times 4 + 3 \times 5 + 6 \times 1}{ 2 + 3 + 5 + 3 + 1}\)
= \(\frac{57}{15}\) = 3.8
Source: Myschool Past Questions Archive (Record #23178)