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If scores are approximately normally distributed, the cut-off is the quantile that leaves exactly as many candidates above it as there are seats. The selection ratio determines the required z-score, which is then converted back into marks using the mean and standard deviation.
Selection ratio
Ratio = Seats available / Total candidates
Cut-off
Cut-off = Mean + z x Standard deviation, where z is the quantile for (1 - Selection ratio)
Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.
Reasonable for large cohorts and well-designed papers, but score distributions are often right-skewed at the top, which makes real cut-offs slightly higher than predicted.
Yes. Each reserved category has its own effective selection ratio within its quota, so its cut-off is computed separately.