2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223384Using distribution p(V/Vm) of V/Vm rather than just mean <V/Vm> in V/Vm-test leads directly to cosmological number density n(z). Calculation of n(z) from p(V/Vm) is illustrated using best sample (of 76 quasars) available in 1981, when method was developed. This is only illustrative, sample being too small for any meaningful results. Keywords: V/Vm . luminosity volume . cosmological number density . V/Vm distribution2 pages, 2 tables, briefest version for Proceedings of 27th Meeting of Astronomical Society of India, Bangaluru, 18-20th February 2009Cosmology and Nongalactic AstrophysicsInstrumentation and Methods for Astrophysicstext