# rule of product

> combinatorial principle to determine possible ways to match disjoint sets.

**Wikidata**: [Q557624](https://www.wikidata.org/wiki/Q557624)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Rule_of_product)  
**Source**: https://4ort.xyz/entity/rule-of-product


## References

1. Freebase Data Dumps. 2013