t
-t
2
-2
Correct answer is C
Mean x = ∑xn
= [(2 - t) + (4 + t) + (3 - 2t) + (2 + t) + (t - 1)] ÷ 5
= [11 - 1 + 3t - 3t] ÷ 5
= 10 ÷ 5
= 2
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