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#I Ching #Dayan Method #Yarrow Stalk Divination #Yi Studies
On the Dayan Yarrow Stalk Method
Exploring the philosophical significance and operational principles of the Great Expansion divination method from the I Ching
2. Probability Calculation
Based on the derivations in Zhu Xi's Introduction to the Study of the I Ching and modern mathematics, the probabilities of the four line types are as follows:
| Line Type | Number | Sum of Removed Stalks | Probability (Fraction) | Percentage |
|---|---|---|---|---|
| Old Yang | 9 | 13 (5+4+4) | 3/16 | 18.75% |
| Young Yang | 7 | 17, 21 (Various) | 5/16 | 31.25% |
| Young Yin | 8 | 17, 21 (Various) | 7/16 | 43.75% |
| Old Yin | 6 | 25 (9+8+8) | 1/16 | 6.25% |