“…Many authors have studied the interval estimation of R. Among them, (Kundu and Gupta, 2006), (Krishnamoorthy and Lin, 2010), (Asgharzadeh et al, 2011), and (Asgharzadeh et al, 2013). (Kotz et al, 2003) have comprehensively covered the problem of point and interval estimation of R. (Singh et al, 2015), and (Asgharzadeh et al, 2017) have also discussed the problem of point and interval estimation of R. Recently, (Mokhlis et al, 2017) introduced point and interval estimation of R = P (X 1 <X 2 ) by different methods when X 1 and X 2 follow a general exponential form or a general inverse exponential form with survival functions given by either…”