In an attempt to minimize no-shows on high-demand days a golf course has implemented am online check-in procedure. Preliminary results indicate that once a golfer has checked in, there is only at 20% chance that he or she will be a no-show. This chance of being a no-show can be modeled using the binomial distribution. If 15 golfers have checked in using this process. what is the expected number of no-shows among these golfers