Originally Posted by striker44
thanks Bohr 8346
I don't know what that means?
This only applies if the ball is put back in ( duh! ) and you only want the chance of getting a black ball in straight picks ( i.e. not 3 blacks in 5 picks etc, but only black black black in 3 picks ).
The chance of getting a black ball ( like any other ball ) is 1/3. To get the final chance you multiply that chance per itself as many times as you want black balls in a row.
Example: 4 black balls in a row -> 1/3 x 1/3 x 1/3 x 1/3
Example: 6 black balls in a row -> 1/3 x 1/3 x 1/3 x 1/3 x 1/3 x 1/3
If you want to get the chance of 4 black balls in 6 tries, including the various combinations, the equation get's more complicated.
If you still don't understand how it works, you might want to try in your native language somewhere.