# 7.6.2. Probability

The set

- A
- B
- C
- D

### Example

The set

### Solution

Write the sample space

Then find the number of elements in the sample space and the number of elements in the set of 2-digit numbers with both digits odd.

To find the probability that both digits of the number are odd, divide the number of 2-digit numbers with both digits odd by the number of all possible 2-digit numbers (the number of elements in the sample space).