In a physically-challenging environment, the tribe with more men has an advantage.
I think the "odd-woman-out" black woman made a big mistake when she voted with the other two women to take out the guy. The two women friends will side with each other against either of the others. The remaining guy's strength will be more important in future contents than odd-woman, so the other two women will vote her out next. If, OTOH, odd-woman had voted out one of the other women, she could have convinced the guys to keep her around
Appears to be a case where personalities take the place of strategy.