I didn't read the article, I don't think these kind has any value, but if you are here.. :) i think it is rather binary, so P_overall_success = 1 - (1 - P_suc

I didn't read the article, I don't think these kind has any value, but if you are here.. :) i think it is rather binary, so P_overall_success = 1 - (1 - P_success) ^ #attempts and expected number of first success: n = 1 / P_success