Una pastisseria ven dolços en capses petites i grans. Tres capses petites i dues grans contenen 102 dolços, i la meitat d’una capsa petita i tres quarts d’una capsa gran en tenen 27. Quants dolços hi ha a cada tipus de caixa?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?