Missed 10 days of Algebra 2. I think they did some Long Division stuff but i need help figuring out how to do this stuff. Detailed explanations would be very much appreciated! Image Below of some example problems i wrote out

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