“…In [5], the results are obtained that concern nontrivial quotient structures available for certain transformations of additive groups, in particular, the result from [3,4] is generalized, which concerns the existence of invariant subgroups of the additive group of ring Z n 2 and subspaces of linear space V n . However, these studies only prove the existence of invariant subgroups, but do not determine the probabilities of the membership in various cosets of the sum of elements belonging to cosets with respect to non-normal subgroup.…”