That's 50% odds for those found at the end. As both your link and the primary link from HN point out, an unknown number of people may have fallen out, eg, into the sea, and not been counted. Your link also points out that some may have been helped at the end by "Good Samaritans" and the success not reported.
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Eh, 50% odds aren't that bad:
http://www.faa.gov/data_research/research/med_humanfacs/oamt...
That's 50% odds for those found at the end. As both your link and the primary link from HN point out, an unknown number of people may have fallen out, eg, into the sea, and not been counted. Your link also points out that some may have been helped at the end by "Good Samaritans" and the success not reported.
The point is, it's not a "miracle", despite unnamed "aviation experts" quoted to that effect.