2016
Mathematics
67ca00ce0c643c71d77dee1f
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.
A.
6
B.
8
C.
7
D.
5
Correct Answer: 7
Explanation
(2 x 4) + (3 x 4) + (4 x y) = 48 8 + 12 + 4y = 48 4y = 48 - 20 4y/4 = 28/4 y = 7
(2 x 4) + (3 x 4) + (4 x y) = 48 8 + 12 + 4y = 48 4y = 48 - 20 4y/4 = 28/4 y = 7THIS WEEK's
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