6 Coin Toss

[Atirekk2017]

I had a hard time trying to figure out this coin toss problem.
I flip a coin 6 times and I need to find out how many different ways can I get 3 heads and 3 tails.
I tried to use the Permutations formula but ended up with (6!)/(6!)

 

[Dr.Peterson]

Try combinations instead: How many ways can you choose which 3 of the 6 coins are heads?

 

[pka]

I had a hard time trying to figure out this coin toss problem.
I flip a coin 6 times and I need to find out how many different ways can I get 3 heads and 3 tails.
I tried to use the Permutations formula but ended up with (6!)/(6!)

Do you know about rearranging a string with repeated symbols?
How many ways can the string \(HHHTTT\) be rearranged?