Answer:
Not binomial: the trials are not independent.
Step-by-step explanation:
Binomial distribution:
In samples with replacement, as the probability has to be the same for each trial, that is, they are independent.
Hypergeometric distribution:
Samples without replacement, as the probabilities depends on the previous outcomes, that is, they are not independent.
In this question:
Marbles are chosen without replacement, which means that for each trial the probabilities of choosing a red marble are different, which means that the trials are not independent. So the answer is:
Not binomial: the trials are not independent.
