Coco's garden has 888 tomato plants, 444 pepper plants, 333 squash plants, and 666 pumpkin plants. for every 777 plants in coco's garden, there are 222 plants. choose 1

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”?