Given `Sigma_(i=1)^(20) a_i=100, Sigma_(i-1)^(20) a_i^2=600, Sigma_(i-1)^(20) b_i=140, Sigma_(i-1)^(20)b_i^2=1000`, where `a_i,b_i` denotes length and weight of an observations. Then which is more varying ?
A. Length
B. Weight
C. Equal C.V.
D. None of these
