The mean of 2 - 4 4 t 3 - 2t and t - 1 is - JAMB Mathematics 2014 Question
The mean of 2 - 4, 4 + t, 3 - 2t and t - 1 is
A
t
B
-t
C
2
D
-2
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Correct Option: C
Mean x = (\frac{\sum x}{n})
= [(2 - t) + (4 + t) + (3 - 2t) + (2 + t) + (t - 1) (\div)] 5
= [11 - 1 + 3t - 3t] (\div) 5
= 10 (\div) 5
= 2
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