A tour company runs a twenty-four-seat bus. Knowing that 25 percent of people don't keep their booking, they only regard their twenty-four-seater as "fully booked"

when they have twenty-eight booked on the tour. However, they will occasionally be caught out by this policy and have to pay compensation when more than twentyfour people on a "fully booked" tour do arrive to take their seats. In what proportion of "fully booked" tours will the company be required to pay compensation?

a. Assume the tour company caters entirely to individuals who make their choice whether to proceed with the tour independently of each other.

 POLI967