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8, 18, 10,14, 18, 11, 13, 14, 13, 17, 15, 8, 16, and 13 The...

Mathematics
WAEC 2019

8, 18, 10,14, 18, 11, 13, 14, 13, 17, 15, 8, 16, and 13

The following are scores obtained by some students in a test. How many students scored above the mean score? 

  • A. 10
  • B. 9
  • C. 8
  • D. 7
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Correct Answer: Option D
Explanation

Mean = \(\frac{8 + 18 + 10 + 14 + 18 + 11 + 13 + 14 + 13 + 17 + 15 + 8 + 16 + 13}{14}\)

Mean = \(\frac{188}{14}\)

Mean = 13.4 

Number above the mean is 7

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