Imagine you have a box of toys, and you want to figure out which toys are more likely to come out of the box than others. This is kind of like what classical probability density does, but instead of toys, we're talking about the likelihood of numbers or events happening.
Let's say you have a bag with 10 marbles in it, and 6 of them are red and 4 of them are blue. If you reach in and grab a marble without looking, the chance of getting a red marble is higher than the chance of getting a blue one.
Classical probability density helps us figure out these kinds of likelihoods. It's a way of representing the probability of a certain outcome happening, based on the number of possible outcomes and the likelihood of each one.
So for our marble example, the classical probability density would give us a higher probability for getting a red marble, since there are more of them in the bag. It's like a little calculator in your head that helps you make predictions about what might happen next.