You order them least to greatest, then take out your mean, median, and mode. Then you've got your outliners left over.
The answer: 1.2
Work:
2 equations: 150=100% and x=0.8%
Combine these
150/x=100/0.8
150= 125x
X=1.2
I think x is equal to 14.7
In case you don't know your times-3 numbers well enough to recognize the answer right away, you can check the second data point.
.. a. 2^3 = 8 ≠ 6
.. b. 3^2 = 9 ≠ 6
.. c. 3*2 = 6
.. d. 2 +3 = 5 ≠ 6
Only selection C makes sense.