According to a study published in Nature, the success rate overall is less than 10%. But the success rate for each following stage significantly increases from 1 to 2, 2 to 3, and 3 to approval.
“They found that the probability of success was 63% in Phase I trials, 31% in Phase II trials, 58% in Phase III trials and 85% during the regulatory review process, for an overall success rate of 9.6% (63% × 31% × 58% × 85% = 9.6%).” —Jun 30, 2016, Parsing clinical success rates: Nature Reviews Drug Discovery
So there is a 17% chance of success from the current phase 2 for each of OM, UP and P. Then each of these that successfully passes phase 2, plus ABSSSI, all individually have a 58% chance for approval.