Hello - Can you please help me with the following?:

You have 2 independent events, each with a 75% probability of success. What is the probability of both events being successful? I think the formula for this would be .75 * .75 = 56%

Can you remember the name of this probability theory? I checked Wikipedia but it listed a dozen different probability theories and I couldn't hash through them all.

What about the same scenario but event B is dependent on the successful completion of event A? What's the specific name of that probability theory and what's the associated mathematical formula?