Question

why do sum of the probabilities of 'n' number of events is 1 ?? I'm asking for reason.​

Answer 1

Answer:

Probability is a number that can be assigned to outcomes and events. It always is greater than or equal to zero, and less than or equal to one.

The sum of the probabilities of all outcomes must equal

1

.

If two events have no outcomes in common, the probability that one or the other occurs is the sum of their individual probabilities.