Talk:Tips and Tricks/@comment-187.189.173.144-20140814174124/@comment-137.207.75.220-20140912004529

That's not right, it should be that the difference between the occurence rate and the occurence rate squared needs to be greater than 0.1

so....

x-x^2>=0.1

x=0.113, 0.887

which means that single invoke would be better between 11.3-88.7% rate of Bs showing up.