New estimates of the number of flare stars

New estimates are proposed for the number of flare stars. They are compared with Ambartsumian’s well-known estimate. Using the new estimates, it is found that flare stars of the same luminosity in the Orion association have the same average flare frequency. Translated from Astrofizika, Vol. 41, No. 1, pp. 73–80, January-March. 1998.