In a frequency distribution of X series having 6 integers with missing one, Xi, among them, the parameters of calculating mean, X̅, are as Σfx = 370 (excluding frequency of missing Xi which is fi = 10), Σf=58 (including frequency of missing integer) and X̅ = 7.586. Which one of the following inters is approximately correct for missing Xi ?
1
6
2
7
3
8
4
9