From seasons four to seven and nine, the twenty-four semi-finalists were divided by gender in order to ensure an equal gender division in the top twelve. The men and women sang separately on consecutive nights, and the bottom two in each groups were eliminated each week until only six of each remained to form the top twelve.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): How were the semi-finalists divided in season four?
by gender