Question: An urn contains $2$ white marbles and $8$ red marbles. A marble is drawn $20$ times in succession with replacement. What is the probability of drawing more than $15$ red marbles?
I had a problem just like this a while back (posted on here) but the marbles was drawn randomly in succession though. So I am stuck on this because it is not random. Also I was told to use a calculator on this so my answer can be accurate without mistakes. Thing is, I need help using the binomial distribution on my calculator (TI-$84$ plus silver edition). Need help.