Talk:Double Rainbow Dragon/@comment-220.255.1.119-20130616074140/@comment-187.71.109.15-20130616225807

Do you mean: What's the chance of getting Double Rainbow on your 5th try once you already got 4 Rainbows? 25%

And what's the chance of getting Double Rainbow on your 1897th try once you already got 1896 Rainbows? 25%

But what's the probability of trying 4 times and getting at least 1 Double Rainbow, since every try has a 25% chance of Double Rainbow? That requires calculation. The answer is 68,36%.