Web: https://www.edx.org/course/probability-the-science-of-uncertainty-and-data
MIT OCW Version - https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/
MIT OCW Scholar Version - https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041sc-probabilistic-systems-analysis-and-applied-probability-fall-2013/resource-index/
Google Hangout Group: https://plus.google.com/communities/106443662577632315869/stream/f0f7eeab-312a-427f-bfcd-eef87742a85d
MicroMaster FAQ: https://micromasters.mit.edu/ds/faq/
Just keep trying it until you succeed. If your probability of success is p, it will likely take 1/p tries.