Probability of flipping a coin and gettin x or more heads/tails?

Hello, Today I found out a lot about probability ( as you can see: http://answers.yahoo.com/question/index;… mainly how to figure out the probability of getting x number of heads/tails by using an equation I discovered ( later to find it is part of binomial theory or w.e ) my question is : What is the... show more Hello,
Today I found out a lot about probability ( as you can see: http://answers.yahoo.com/question/index;... mainly how to figure out the probability of getting x number of heads/tails by using an equation I discovered ( later to find it is part of binomial theory or w.e ) my question is :

What is the probability of flipping a coin and getting, say 11 or more heads out of 20 tosses. Also, something which would be helpful is if someone could explain Vasek's answer at: http://www.24gambling.net/casino/what-ar...

Bottom of the page... This would really help me with probability, I really find it cool :) Thanks!
Update: http://www.24gambling.net/casino/what-ar...

working link (YA cuts off links...)
2 answers 2