A student has to make 4 university entry exams. For passing each exam he gets either 2,3 or 4 points. He needs to reach at least

 A student has to make 4 university entry exams. For passing each exam he gets either 2,3 or 4 points. He needs to reach at least 13 points to get to the university. In how many ways can he do the exams to be succesfull?​

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