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What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2?

Mathematics
JAMB 2008

What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2?

  • A. 2t
  • B. 2t-1
  • C. 2/3t+1
  • D. 2t-1/3
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Correct Answer: Option D
Explanation

\(Mean = \frac{t+2t-1+t-2+2t-1+4t+2t+2}{6}\\
Mean = \frac{12t-2}{6}\\
=\frac{2(6t-1)}{6}\\
=\frac{6t-1}{3}\\
=\frac{6t}{3}- \frac{1}{3}\\
=2t-\frac{1}{3}\)

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 - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free