Question

From a group of 9 people, you randomly select 4 of them. What is the probability that they are the 4 oldest people in the group

1. Giakhanh
The probability that they are the 4 oldest people in the group = 4/9

### What is probability?

The area of mathematics known as probability deals with numerical descriptions of how likely it is for an event to happen or for a claim to be true. A number between 0 and 1 is the probability of an event, where, broadly speaking, 0 denotes the event’s impossibility and 1 denotes its certainty.

### According to the given information:

the group of people = 9
you randomly select 4 of them
the probability that they are the 4 oldest people in the group?
According to the formula :
Probability = expected number of outcome/Total number of outcome
If there are group of 9 people, then the total outcome of events will be 9.
If we are to select 4 oldest people from the group, then the expected outcome is 4.
So,
The probability that they are the 4 oldest people in the group = 4/9
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