yeah, yeah... don't ask for help... dis be discussion, i know.

buuuut, i'm stupid... and i don't know what to put in in wolframalpha to get the right answer.

would luv if u could explain to me why you need to do it the way it needs to be done :3 not just the answer.

so the question is as follows:

if you have a chance of 1/420 in the first 420 tries/rolls and a chance of 1/210 for every try/roll afterwards: what is the overall average for n -> infinity rolls.

it should be somewhere between those two chances, but i am not sure how to ... well... ~~add~~ ... ~~multiply~~ ... put those together.

could anyone help me out? T_T