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The mean of the numbers 13, 16, x, 18, 21, 2x, 35, is 22. Find...

Mathematics
JAMB 2024

The mean of the numbers 13, 16, x, 18, 21, 2x, 35, is 22. Find the value of x

  • A. 16
  • B. 17
  • C. 23
  • D. 25
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Correct Answer: Option B
Explanation

Mean = \(\frac{ 13 + 16 + x + 18 + 21 + 2x + 35}{7}\) = 22

103 + 3x = 154

3x = 154 - 103 = 51

x = \(\frac{51}{3}\) = 17

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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