Question: Three of the women at the cocktail party are wearing 4 inch heels and three are wearing 2 inch heels. What is the average height of heels at this party?
Solve this problem. 
Answer: 
First find the total number of inches from the 4-inch heels: 3 women * 4 inches/woman = 12 inches
Then find the total number of inches from the 2-inch heels: 3 women * 2 inches/woman = 6 inches
Then add the total number of inches from each group of heels to find the overall total: 12 inches + 6 inches = 18 inches
Then find the total number of women at the party: 3 women + 3 women = 6 women
Then divide the total number of heel inches by the number of women to find the average heel height per woman: 18 inches / 6 women = 3 inches / woman