It is the probability of what should occur.
"theoretical probability."
The classic wood carousel at Carousel Park in Hampton, VA has 32 jumping horses and 16 standing horses. What is the probability of randomly selecting a jumping horse?
2/3, or 32/48
A spinner is divided into 5 equal sections lettered A to E. Sam spins the spinner 25 times. His results are:
A - 6 times
B - 5 times
C - 7 times
D - 4 times
E - 3 times
Based on these results, what is the probability that the sponner lands on D?
4/25
The probability of what actually occurs.
"experimental probability."
An event that has 100% chance of occurring
Certain event
There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaces. A second marble is then taken out and not replaced. What is the probability both marbles that were taken out are red?
1/5, or 0.20, or 20%
When one event occurs and the item is replaced before the second event occurs.
"independent event."
When one event occurs and that item is not replaced before the second event occurs.
"dependent event."