2007
Mathematics
67ca00ce0c643c71d77dee1f
The table above gives the frequency distribution of marks obtained by a group of students in a test. If the total mark scored is 200, calculate the value of y
A.
15
B.
13
C.
11
D.
8
Correct Answer: 11
Explanation
Total mark scored = 200 ∴200 = 15 + 4y - 4 + 5y + 54 + 28 + 8 200 = 9y + 101 200 - 101 = 9y 99 = 9y ∴y = 11
Total mark scored = 200 ∴200 = 15 + 4y - 4 + 5y + 54 + 28 + 8 200 = 9y + 101 200 - 101 = 9y 99 = 9y ∴y = 11THIS WEEK's
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