Talk:Rashomon Event (US)/@comment-25712820-20180510173839/@comment-33579485-20180510203223

Lets see:

the probability that you'll get a 5* is 1%.

The probability that you'll get the rateup servant if a 5* is drawn is 70%.

To find the probability, we find the base probability of failing(99.3%) multiplied by itself 100 times, or 0.993¹⁰⁰, which equals about 0.49536.

So if that's our chance of failing, then you have a [1 - 0.49536] = 50.463% chance of getting the rateup 5* at least once in 100 tries.