Imagine a game of dice. When you roll a die, there are six possible outcomes: 1, 2, 3, 4, 5, or 6. The chance of rolling any one of these numbers is the same: 1 in 6.
Probability is like a measure of how likely something is to happen. In the dice example, the probability of rolling a 6 is 1/6.
Probability distribution is like a map that shows all the possible outcomes of an event and how likely each outcome is. For the dice, the probability distribution would be a table showing that each number has a 1/6 chance of being rolled.
Here's a simpler way to think about it:
To sum it up: Probability tells you how likely something is, and probability distribution shows you all the possibilities and how likely they are.