or
or
Average: Total number of observations divided by the sum of all observations.
Calculation: Suppose the average weight of five men is x. Five men's combined weight equals five times. Average weight of five men if a man were to be substituted = (x + 2) If a guy were to be substituted, the combined weight of five men would be five (x + 2), five (x + 10), and so on. Suppose the new man weighs y pounds. In light of the query 5x – 60 + y = 5x + 10 ⇒ y = 5x + 10 + 60 – 5x ∴ y = 70
