olemus
tõenäosusteoorias: üheainsa tulemiga sündmus
= in probability theory: an event with a single outcome

ülevaateid
https://libraryguides.centennialcollege.ca/c.php?g=717168&p=5125562

https://mathbitsnotebook.com/Algebra2/Probability/PBCompoundEvents.html

https://www.nagwa.com/en/explainers/985161036067/