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N students ate 3 different flavored pizzas with the same size. Two pizzas were equally distributed to n students. Since three students did not like the flavor of the third pizza, they did not ate it ,and the third pizza was equally distributed to the other students. If one student ate pizzas of all three kinds of flavors, then what fraction of all the 3 pizzas is the pizzas he ate?
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以上解析由 考满分老师提供。
