Of all the four-digit positive integers containing only digits from the set {2, 4, 6, 8}, what fraction of them have at least one of their digits repeated? Express your answer as a common fraction.
Of all the four-digit positive integers containing only digits from the set {2, 4, 6, 8}, what fraction of them have at least one of their digits repeated? Express your answer as a common fraction.
Hi sri340,
We can ask "how many have no repeated digits" ?
This is 4! as all 4 digits must be different.
There are 4-digit numbers given the digits may be repeated.