We present the magnetic properties of complete solid solutions of ZnCr₂O₄ and CoCr₂O₄: two well studied oxide spinels with very different magnetic ground states. ZnCr₂O₄, with non-magnetic d¹⁰ cations occupying the A site and magnetic d³ cations on the B site, is a highly frustrated antiferromagnet. CoCr₂O₄, with magnetic d⁷ cations (three unpaired electrons) on the A site as well, exhibits Néel ferrimagnetism as well as commensurate and incommensurate non-collinear magnetic order. More recently, CoCr₂O₄ has been studied extensively because of its polar behavior which arises from conical magnetic ordering. Gradually introducing magnetism on the A site of ZnCr₂O₄ results in a transition from frustrated antiferromagnetism to glassy magnetism at low concentrations of Co, and eventually to ferrimagnetic and conical ground states at higher concentrations. Real-space Monte Carlo simulations of the magnetic susceptibility suggest that the first magnetic ordering transition and features of the susceptibility across x are captured by near-neighbor self-couplings and cross-couplings between the magnetic A and B atoms. We present, as a part of this study, a method for displaying the temperature dependence of magnetic susceptibility in a manner which helps distinguish between compounds possessing purely antiferromagnetic interactions from compounds where other kinds of ordering are present.