ANSWER
The sum of the probabilities in a probability distribution is 1
Explanation
What to find? The sum of the probabilities in a probability distribution
A probability distribution is a collection of probabilities that defines the likelihood of observing all the various outcomes of an even experiment.
The following conditions need to be met for a probability distribution
1. Each probability in the distribution must be of a value between 0 and 1
2. Sum of all the probabilities distribution must be equal to 1
Hence, the sum of the probabilities in a probability distribution is 1