two series X and Y with 50 items each have S.D 4.5 and 3.5 respectively. if the sum of product of deviation of X and Y series from their actual mean be 420. find the coefficient of correlation. Share with your friends Share 1 Vaishali Nebhwani answered this Dear student, N =50σx=4.5 σy = 3.5Σxy = 420r= ΣxyN·σx·σr =42050×4.5×3.5r = 420787.5 = 0.533 Regards 5 View Full Answer Ajin Saji answered this ask ur maths teacher -1 Govinda Kakkar answered this Refer to vk ohri 0