Talk:Summoning/@comment-93.174.90.30-20170906144719

I try to calculate the chance of not getting a 4 star or 5 star in a 10x roll, with the assumtion that the system check the first 8 rolls and decide the guarantee servant and the guarantee gold for the last 2 roll. The progress is a little long so I just post the result here: you have 0,49716 chance to not get a 4 star servant and 0,74393 chance to not get a 5 star servant. Depend on that result, you need 7*10x rolls (210SQ) to have more than 99% chance of getting 4 star servant and 16*10x (480 SQ) rolls to have more than 99% chance getting 5 star servant.