1) How many permutations can be formed by sampling 3 things from 6 different things without replacement?

2) How many combinations of 4 people can be formed from 8 people?

3)There are two mutually exclusive reasons for visiting the emergency room of the local hospital: it is either an emergency or it is not an emergency.If the probability that a patient visiting the emergency room has an emergency is 0.68, what is the probability that the next patient has an emergency and the patient after the next one does not have an emergency?Assume that the patients arrive at the emergency room independently. (Round to three decimal places.)