mark
2
3
4
Frequency
4
4
y
The table above shows the frequency distribution of marks obtained by a group of students. If the total mark is 48, find the value of y.
Attached Figure / Diagram
A
6
B
8
C
7
D
5
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
(2 x 4) + (3 x 4) + (4 x y) = 48
8 + 12 + 4y = 48
4y = 48 - 20
\(\frac{4y}{4}\) = \(\frac{28}{4}\)
y = 7
Source: WAEC / JAMB / NECO Classroom Archive (Record #44776)