Conditional probability - without replacement

This video demonstrates conditional probability and finding a probability without replacement. Each time you remove an item, you have one less of that type of item and one less item overall. So the numerator and denominator both decrease by 1 each time. This can also be modeled using combinations. Try 48 nCr 4 divided by 72 nCr 4.

STA2023, HW2, #39