Mean is the average. To find the average of any set of numbers, you add up the numbers and divide that sum by the number of numbers you added. Here when you add the numbers together you get 365. Because there were 10 numbers there, divide 365 by 10 to get 36.5, or B
This is simple , minus 50 from 100 and that gives you 50 left . then divide that by 2 and that gives you 25 . so the minimum number of sales required is 25 . hope this helps :)<span />
