In a certain group of community, a group of 10 adults consisting of 4 citizens planned to go on an out-of-town meeting. One car could accomodate 5 passengers. Let X be the number of senior citizens...

In a certain group of community, a group of 10 adults consisting of 4 citizens planned to go on an out-of-town meeting. One car could accomodate 5 passengers. Let X be the number of senior citizens that the car could accomodate. a) What is the notation? b) Give the PMF c) What is the probability that, in the car, all senior citizens would be together? c)