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Mathematics, 07.10.2021 20:30 jaylafennell101

Un examen consta de 5o preguntas, cada una con cuatro posibles respuestas. Por cada respuesta correcta se dan 3 puntos y por cada respuesta incorrecta se quita 1 punto. Las preguntas no respondidas no puntúan. Un alumno que respondió a 42 preguntas tiene 58 puntos. ¿Cuántos aciertos tuvo?

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