Juan is playing a video game. the table below shows juan’s score in each game and level. what is the difference between juans score in game 1 and his total score in game 2

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”?