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
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
\(Mean = \frac{t+2t-1+t-2+2t-1+4t+2t+2}{6}\)
Mean = \(\frac{12t-2}{6}\)
=\(\frac{2(6t-1)}{6}\)
=\(\frac{6t-1}{3}\)
=\(\frac{6t}{3}- \frac{1}{3}\)
=2t-\(\frac{1}{3}\)
Source: Myschool Past Questions Archive (Record #9295)