why does the probability of a success in a binomial exper...

[holdyourhorsiieees]

why does the probability of a success in a binomial experiment have to remain constant?

If it's everchanging then you can't neccessarily calcualte anything.
-Is that a decent explanation......I know that the prob of success definitely has to be constant, it's just hard to explain.

 

[galactus]

One reason it remains constant is because replacement is assumed. If there were no replacenment, then the probabilities would change at each trial. This would be a hypergeometric probability, not binomial.