2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79541This paper concerns a probability distribution on the symmetric group generalizing the riffle shuffle of Bayer, Diaconis, and others. There are close connections with the theory of quasisymmetric and symmetric functions.19 pages: minor corrections and the omission of some material that has appeared in more general form elsewhereCombinatoricsProbability05E99; 06B15text