they are alike because they both have the last word "probability"
The difference between theoretical probability and experimental probability is that theoretical probability is more of a CHANCE, and experimental probability is when you actually TEST it.
They are probabilities: that is, estimates of the likelihood of an event happening.
As the number of times that the experiment is conducted increases, the experimental probability will near the theoretical probability - unless there is a problem with the theoretical model.
The difference between experimental probability and theoretical probability is that experimental probability is the probability determined in practice. Theoretical probability is the probability that should happen. For example, the theoretical probability of getting any single number on a number cube is one sixth. But maybe you roll it twice and get a four both times. That would be an example of experimental probability.
Both are measures of the likelihood of events whose outcome is uncertain.
They are experimental probabilities.
Here is a website http://www.onlinemathlearning.com/theoretical-probability.html with relevant content on how you will solve for experimental and theoretical probability.
Theoretical probability is what should occur (what you think is going to occur) and experimental probability is what really occurs when you conduct an experiment.