Wikipedia sayings about which of the following is not a property of a binomial experiment?

1.Beta negative binomial distribution

probability theory, a beta negative binomial distribution is the probability distribution of a discrete random variableĀ X equal to the number of failures needed

https://en.wikipedia.org/wiki/Beta negative binomial distribution

2.Mathematical statistics

distribution, for binomial-type observations but where the quantity of interest is the number of failures before the first success; a special case of the negative

https://en.wikipedia.org/wiki/Mathematical statistics