IteratedProbability: "roll until probability" gives the target instead of actual probability

[HeladoDeBrownie]

if you give it a target probability of 0.51 and a probability of 0.5, it says this:

At 2 rolls at 0.5, there's a 0.51 chance that there will be at least one success.

but this would be more accurate:

At 2 rolls at 0.5, there's a 0.75 chance that there will be at least one success.

(also i kinda want to change its name to something less arbitrary. i wonder if BinomialDistribution would work or if that's not quite right)