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The table shows the scores of a group of students in a test. If the...

Mathematics
WAEC 1997
The table shows the scores of a group of students in a test. If the average score is 3.5, find the value of x
  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 5
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Correct Answer: Option B
Explanation
1 + 8 + 15 + 24 + 12 + x/18 + x
= 3.5

120 + 10x = 126 + 7x
3x = 6
x = 2
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