Mass ratio q = M_sec/M_prim as a function of binary separation. Red open circles show binaries with two non-accreting components (WW), blue triangles (up) show mixed systems with an accreting primary and green triangles (down) with an accreting secondary from the restricted sample. Gray symbols represent targets that are in the full sample but not in the restricted sample. There are two binaries (Hn 4, T 39 AB¹⁰ both WW) where the mass of the fainter component is calculated to be higher than the primary’s mass. The inverse q^-1 is plotted for these.