eng Science and Education Publishing American Journal of Applied Mathematics and Statistics 2328-7292 2015-08-13 3 4 168 176 10.12691/ajams-3-4-7 AJAMS2015347 article Salah H. Abid abidsalah@gmail.com 1 Sameer Q. Hasan 1 Uday J. Quaez 1 Mathematics department, Education College, Al-Mustansiriya University, Baghdad, Iraq In this paper, the approximate controllability of nonlinear Fractional order 0<<1 Riemann-Liouville type stochastic perturbed control systems driven by mixed fractional Brownian motion in a real separable Hilbert spaces has been studied by using Krasnoselskii's fixed point theorem, stochastic analysis theory, fractional calculus and some sufficient conditions. http://pubs.sciepub.com/ajams/3/4/7/ajams-3-4-7.pdf approximate controllability mixed fractional brownian motion fixed point theorem perturbed control systems mild solution control function