There are 48 students in a class. The number of people who can play chess is three times that of people who can play go. The number of people who can play both kinds of chess and can't play both kinds of chess is four

There are 48 students in a class. The number of people who can play chess is three times that of people who can play go. The number of people who can play both kinds of chess and can't play both kinds of chess is four

Suppose the number of people who can play go is X. according to the meaning of the question: x + 3x-4 + 4 = 48, the solution is: x = 12. A; the number of people who can play go is 12

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