Because Xiaoming can have 1 2 3 4 5 6 * * six situations, the car is in the seventh box, Xiaoming can't get the car, and then throw it to Xiaohong, which is the score. If Xiaoming is 1, Xiaohong can only take a car with 6; If Xiaoming is 2, Xiaohong can only get a car with 5, and so on, the probability is 1/6.