Hi, My question is related to the following problem. “80% of all California drivers wear seat belts. If three drivers are pulled over, what is the probability that all would be wearing their seat belts?” Now I know that the answer of this problem is = 0.8 * 0.8 * 0.8 = (Probability of the first person wearing belt x prob. of the second person wearing belt x…) However, there is another question that comes to my mind. What if we say that 80% of the sample (of the three people) will be wearing seat belts? Or do we have to always treat them as Bernoulli trials? Thanks.