In: Statistics and Probability
An urn contains red and green colored balls. You draw a sample of five balls from the urn.
(a) Suppose the urn contains 18 balls, half of which are red. What is the probability that the sample contains a red ball?
(b) Suppose the urn contains 144 balls, half of which are red. What is the probability that the sample contains a red ball?
(c) Suppose the urn contains 144 balls, 10 of which are red. What is the probability that the sample contains a red ball?