A pottery studio gives three-hour and four-hour ceramics classes for $21 an hour. If the studio has collected $4,179 for a total of 57 classes, how many 3-hour class is and how many four-hour classes were paid for? ​

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000