What is the difference between average demand and average production of the five companies taken together ?
280
Avg. demand = Total demandNo. of companies = 3000+600+2500+1200+33005 = 106005 = 2120
Avg. production = Total productionNo. of companies = 1500+1800+1000+2700+22005 = 92005 = 1840
Difference = 2120 - 1840 = 280