2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93983Einstein-Podolsky-Rosen (EPR) paradox is considered in a relation to a measurement of an arbitrary quantum system . It is shown that the EPR paradox always appears in a gedanken experiment with two successively joined measuring devices.2 pages, REVTEX, accepted JETPQuantum Physicstext