Title Estimating R= P (Y< X) in the generalized Rayleigh distribution with different scale parameters Type of Research Article Keywords Generalized rayleigh distribution, Maximum likelihood estimator, Simple iterative procedure, Simpson integration Abstract In this paper we consider the estimation of R = P(Y Researchers Parvin Fathipour (First Researcher)، ali abolhassani (Second Researcher)، Hossein Hossein Jabbari Khamnei (Third Researcher)