A computer, while calculating the correlation coefficient between two variables X and Y, obtained the following results:
$$N = 25, \sum_{}^{}x= 125, \sum_{}^{}y= 100, \sum_{}^{}x^{2}= 650, \sum_{}^{}y^{2}= 460$$ and $$\sum_{}^{}xy= 508$$
At the time of checking, it is found that it copied two pairs of observations as

in the place of correct pairs

.The correct value of the coefficient of con-elation r is