The chance of having a "good" neurological outcome is even lower. The overwhelming majority of children and adults that suffer out-of-hospital arrests expire, unfortunately. We as a medical community need to do better and there is ongoing research to ensure we are better equipped to treat such events in the future.
Survival to discharge for out-of-hospital cardiac arrests that were treated by emergency personnel was 9.5% for patients of any age in the US in 2010 (this is the most recent data available in the manuscript I found after a quick search online -- I'll post the link below).
I'm a physician, but won't speculate in this particular case as I was not present for the resuscitative efforts. However, your understanding of the outcomes associated with cardiac arrest is misguided (this is not meant as a personal attack -- in fact, there is evidence that the lay public greatly overestimates survival following cardiac arrest, perhaps due to how these events are depicted in the media).