Simple Probability Question

Hi. I have a simple probability question:

Not counting the greens, what are the odds of getting 19 of the same color in a row in roulette?

I'm assuming the answer would be 0.5 to the 19th power.

I tried to do this in Excel, but it would not calculate it.

I'm thinking the answer is something like 1 in 500,000?

Please let me know if this is close.

Thanks! You guys are awesome!


Ambassador to the humans
What do you mean by the 'actual figure'? Like the actual fraction? For that you just need to figure out 2^19 = 524288 so the fraction is 1/524288 exactly.


TS Contributor
I'm an amateur but it's my sense that carrying three significant figures is probably accurate enough for most probability calcs.


Ambassador to the humans
Ha. That's true, I got caught up in the actual calculation that I didn't really think about that stuff. Oh well. Plus it's not that much more difficult to find the probability when accounting for the greens so I don't really seem why we're ignoring them.