For a certain type of hay fever, Medicine H has a 30% probability of working.

Question

In which distributions does the variable X have a binomial distribution?

Select each correct answer.

When the medicine is tried with six patients, X is the number of patients for whom the medicine does not work. **

When the medicine is tried with two patients, X is the number of patients for whom the medicine worked.

When the medicine is tried with six patients, X is the number of patients for whom the medicine worked. **

When the medicine is tried with two patients, X is the number of doses each patient needs to take.