Final answer:
The maximum likelihood estimator of the parameter p for a geometric random variable X can be found using the formula (n/x), where n is the sample size and x is the number of successes in the sample.
The correct answer is A.
Step-by-step explanation:
Maximum Likelihood Estimator for Geometric Random Variable
The maximum likelihood estimator of the parameter p based on a random sample of size n for a geometric random variable X can be found using the formula:
(n/x)
where n is the sample size and x is the number of successes in the sample. This estimator is the ratio of the sample size to the number of successes.