On Esseen type inequalities for combinatorial random sums

We derive new bounds of the remainder in a combinatorial central limit theorem with a random number of summands. Esseen type inequalities are obtained for random combinatorial sums. Various moment conditions are considered. Moments of order 2 + δ, δ ∈ (0, 1], are partial cases. A variant of a combinatorial central limit theorem is proved for random sums with indices having Poisson distributions.