There is a discrepancy in my AP Statistics class as to the correct answer to this question. What is your answer, and why?
(From the binom/geomet, pdf/cdf chapter: )
In a certain large population, 40% of households have a total annual income of $70,000. A simple random sample of 4 of these households is selected. What is the probability that 2 or more of the households in the survey have an annual income over $70,000?
e) The answer cannot be computed from the information given.