Physical Sciences
On a Friday night in late March 2013, there were hundreds of reports of meteor sightings along the East Coast of the United States. People from North Carolina to Canada contacted the American Meteor Society to report what they saw and heard. Suppose that in a group of 25 people at the National Mall, 15 actually saw the meteor. A patrolman randomly selects five people from this group.
a. What is the probability that none of the five people saw the meteor?
b. What is the probability that at least four people saw the meteor?
c. What is the probability that at most two people saw the meteor?