Question

if you flip a coin 10 times, what is the probability you get 5 head ?
I thought I would get 50% but I just got 25% using the Binomial Distribution. Why this happend?
Links:
my calculation-> https://www.google.com.br/search?q=(10!%2F(5!*(10-5)!))+*+(0.5%5E5)+*+((1-0.5)%5E(10-5))+%3D&aq=f&oq=(10!%2F(5!*(10-5)!))+*+(0.5%5E5)+*+((1-0.5)%5E(10-5))+%3D&sugexp=chrome,mod=16&sourceid=chrome&ie=UTF-8
the wikipedia article -> http://en.wikipedia.org/wiki/Binomial_distribution

Answer 1

what exactly does this mean
"what is the probability to 5 head flipping a coin? I"

Answer 2

question should be of the form
if you flip a coin n times, what is the probability you get k head
or
if you flip a coin n times, what is the probability you get
more than k
less that k
exactly k
heads

something like that

Answer 3

I edited the question guys. Thank you =)