Answer Happy

Question 5 [8 Marks The manager of a car showroom monitored the mumber of cars sold during two successive five-day periods. During the first five days the numbers of cars sold per day had a mean 1.8 and variance 0.56. During the next five days the numbers of cars sold per day had mean 2.8 and variance 176. Find the mean and variance of the numbers of cars sold per day during the full ten days