Final answer:
The likelihood of a woman with PPROM at 30 weeks gestation delivering within a week is high, possibly around 80 percent, as most cases of PPROM result in labor within 48 hours, and a 30-week fetus has a viable chance of survival.
Step-by-step explanation:
The likelihood that a 19-year-old G2P1 woman at 30 weeks gestation, who presents with preterm premature rupture of membranes (PPROM) six hours ago, will deliver within a week is generally high since most cases of PPROM lead to labor beginning within 48 hours of membrane rupture. Fetal viability is also a crucial factor at this stage of gestation. At 30 weeks, a fetus is viable, and the survival chances are much better than at earlier gestational ages. Therefore, considering these factors, among the provided options, the probability might be closer to 1) 80 percent.