What is the missing probability in this probability distribution?

interval

0-10

11-20

21-30

31-40

41-50

probability

0.105

0.255

?

0.301

0.214

The sum of the probabilities of all events must always be 1. It doesn't even matter what these events are; by this I mean that the exercise could have only said "5 events have the following probability, what is the missing one?".

The only important thing is that we have to choose the missing probability in such a way that the sum of all 5 probabilities will be 1. Let's do this:

So, the missing probability is 0.125

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632