<image> The girls from Class 1 and Class 2 are having a tug-of-war match. Both teams want to occupy the north side of the playground first. Later, Xiaoming came up with an idea: there is a wooden box containing 5 black balls and 5 green balls. Each person draws a ball twice. If more black balls are drawn, Class 1 occupies the north side. If more green balls are drawn, Class 2 occupies the north side. Is this method fair to both Class 1 and Class 2?