Create two sets. Set A will be the list of the five items you personally need to buy the most (essential items). Set B will be the list of the five items that you want to buy the most (fun stuff). List the items in Set A and Set B, and also list the items in the unions and intersections of Set A and Set B.
Now assume that the prices of the items in your set A are 3, 4, 5, 7 and 8. Assume that the prices of the items in your set B are 9, 10, 3, 6 and 4.
Note: if however you have one or two identical items in both sets, then assume that the prices of the identical items are the same (instead of having two different prices to the same item.)
What will the price of Set A be if it contains one unit of each item? What will the price of the union set be if it contains one unit of each item? The price of the intersection?
Sets and Set Operations are investigated.