statistics

Four students decide to be absent for the final exam so they have more time to study. All four tudents come in together several hours after the final has ended and tell the professor they were late ecause the car they were driving in had a flat tire. The professor says they can still take the final exam and puts each student in a separate room. The tudents cannot communicate with one another in any way. The professor puts only one question on he final and it's worth 100 points. The question is "Which tire went flat? What is the probability that all four students guess the same tire? Also explain your