eng Science and Education Publishing Journal of Mathematical Sciences and Applications 2333-8792 2015-08-14 3 1 3 11 10.12691/jmsa-3-1-2 JMSA2015312 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 Sobolev type with order Caputo stochastic differential equations driven by mixed fractional Brownian motion in a real separable Hilbert spaces has been studied by using contraction mapping principle, fixed point theorem, stochastic analysis theory, fractional calculus and some sufficient conditions. http://pubs.sciepub.com/jmsa/3/1/2/jmsa-3-1-2.pdf approximate controllability mixed fractional brownian motion fixed point contraction principle stochastic differential equations mild solution control function