Relative bound mass at 20 Myr as a function of SFE: a) Comparison of cluster models with a Plummer distribution of single stars (model P0 – solid line, squares) and stars chosen according to an IMF (model P1 – dashed line, triangles). b) Comparison between cluster models with a Plummer (model P1 – dashed line, triangles) and a King distribution (model LK1 – solid line, circles. c) Results for model LK1 with 30 000 stars (thick solid line) showing the error bars for results averaged over 15 simulation runs (thin solid line) and the error of a single simulation with 10 000 stars would yield (dotted line).