Talk:FGO Summer 2018 Event Revival (US)/@comment-38853249-20190715181619/@comment-36901850-20190718231037

@JQ-sama

Well it's based on the statement in Summoning article that says that the 5* rate doesn't change for the 30 SQ summon and that the 5* servant rate is 1%.

So the chance that you won't get the 5* servant in one summon is 99% (or 0.99). Therefor chance that you wont get any 5* servant from 10 summons is 0.99^10 that is about 0.904 (or 90,4%) after some rounding. From there the chance that you will get at least one 5* is 100% - 90,4% = 9,6% (i had wrong rouding in my previous calculation). Since the 5* rate is not affected by 30SQ summon bonus the chance is same for both cases.

The chance to get the 3* in one summon is 80% (40% servant + 40% CE). The chance to get 3* in each of 10 summons is 0.8^10 that is about 0.107 (or 10,7%) after rounding. And there is no guaranteed 4/5* drop in single pulls.