Mary has a scale, which she decides to calibrate using a one-kilogram mass. Which of the following sets of measurements in kilograms reflect the most precise calibration?
W) 2.1, 2.1, 2.0
X) 0.6, 1.0, 1.4
Y) 1.0, 0.8, 0.6
Z) 0.7, 1.3, 1.0
✔️Answer:W) 2.1, 2.1, 2.0
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