Thirty percent of all households have a DVD player.If you select 20 houses at random,what is the probability that six or fewer of them have a DVD player?
A)0.608
B)0.416
C)0.344
D)0.238

Question

Quizplus · Accepted Answer

This is a binomial probability problem where n = 20 (number of trials), p = 0.30 (probability of success), and we're looking for the probability of x ≤ 6 successes. The cumulative binomial probability formula or a binomial distribution table/calculator can be used to find this probability, which is approximately 0.608.

Thirty Percent of All Households Have a DVD Player