1. How to control probability of dice
Shota kuthumi
Kazuki kitayama

2. We examined number of dice under the same condition.

3. Hypothesis If we drop dice under the same exact condition, the dice will show the same number.

4. First experiment

5. Experiment tools ・Precision dice ・Karankoron

6. About precision dice
This dice is called ‘‘precision dice’’ because center of gravity of this dice is the center

7. We made this machine to drop dice on the same condition.
About Karankoron

8. Finally , we check the dice
How to experience
First , we put the dice whose top is 1 and front is 2
Second , Karankoron drop the dice
Finally , we check the dice

9. Result
The number of times
The number of dice

10. Inquiry We can’t same condition so number isn’t the same number But
Inquiry We can’t same condition so number isn’t the same number But... We can similar condition so number is similar number

11. In order to make Karankoron precise, we improvement it.

12. Improvements of Karankoron
Reinforcing a part of it
to reduce waste motion
Exchanging box
for board to reduce motion
Exchanging the
board for stronger one

13. We experiment again with new machine,karankoron2