The Bean Bag population experiment

by Patrick Meyer


  • A large bag of kidney beans
  • A large bag of white beans
  • 4 or 5 styrofoam cups
  • 1 paper plate
  • A bowl to hold the beans
  1. We counted 50 white beans and 50 kidney beans and put them in one cup
  2. Then we closed our eyes and took out five beans randomly
  3. We kept taking out more beans until all five beans were of one type
  4. Then we added some beans and took away some to change the ratio of the types of beans
  5. We repeated this except we changed the type of beans used 4 or 5 times.
  6. We also repeated the experiment using a paper plate and placing it over the cup when we took the beans.
  7. We poked holes in the paper plate to let the beans fall out using a pen, but a pencil or any type of writing utensil could be used.
  8. Every time starting from step 2 we recorded our results and tested our experiment multiple times.



  • We concluded that even if there was more white beans in the cup, the red kidney beans we typically more prevalent then the white beans.
  • We believe that the reason for kidney beans being more common is due to the size of the red kidney beans.
  • There were many factor affecting the experiment such as the smooth shell of the white bean compared to the rough surface of the white beans, the size of the beans, and the size of the hole in the paper plate punched by the pen.

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