(0.27)2+(0.21)2+(0.29)2(0.027)2+(0.021)2+(0.029)2 \sqrt { \frac{(0.27)^2+(0.21)^2+(0.29)^2 }{(0.027)^2+(0.021)^2+(0.029)^2 }} (0.027)2+(0.021)2+(0.029)2(0.27)2+(0.21)2+(0.29)2 = A10B100C0.1D0.01Answer: A. 10
