In Cleveland, 80% of the families live west of the freeway and the other 20% live east of the freeway. The mean annual income of the families living west of the freeway is $45,000, and he mean annual income of the families living east of the freeway is $40,000. What is the mean annual income for all the families in Cleveland?
Where do I start? Obviously, you can just add the two dollar amounts and divide by two, right?
Where do I start? Obviously, you can just add the two dollar amounts and divide by two, right?
