Mathematics, 04.05.2020 22:51, laraekeyes

David debe realizar cinco pruebas escritas, en las cuatro primeras ha obtenido 34, 65, 55 y 40 puntos, si ha de obtener una media de 50 puntos, ¿cuál debe ser su puntuación en la quinta prueba?

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David debe realizar cinco pruebas escritas, en las cuatro primeras ha obtenido 34, 65, 55 y 40 punto...