Answer:
The probability of getting an odd number is 7/10.
Explanation:
There are 7 odd numbers: {1, 3, 7, 9, 15, 19, 21}
There are 3 even numbers: {2, 10, 20}
There are 10 numbers overall: {1, 2, 3, 7, 9, 10, 15, 19, 20, 21}
7 odd numbers out of 10 numbers is equal to 7/10