Count it!
Probability
Level
2
How many 4 digit even numbers can be formed using the numbers 2,3,5,8,9?
Note: The same number can repeat. For example, 2222 must also be counted
2359
100
200
250
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The first 3 digits could be any of the 5, meaning there are 5 possibilities for each of them. However, for the number to be even, the last digit must be even, meaning that we can choose either 2 or 8, meaning that there are 2 possibilities. So the total amount of numbers is 5 ∗ 5 ∗ 5 ∗ 2 = 2 5 0