Center Focus

Tile Probability

  1. Label three bags A, B, and C. Put 12 tiles in each bag. The tiles need to be a mixture of three colors, but different amounts of each color in each bag. For example one might have 2 green, 5 blue, and 5 red; while another might have 10 green, 1 red, and 1 blue.
  2. Instruct students to pick a bag and write down the letter on the label.
  3. Then without looking in the bag, they will need to pick out one tile, record it, and put it back. They do this 12 times .
  4. They then repeat step 3 two more times.
  5. With this information they predict the number of each tile color in the bag.
  6. The last step is to check their answer. How close was their prediction?