There are nine cards of 0, 0, 0, 1, 1, 1, 2, 2, 2.
When taking four cards out of these cards and making the integer of 4 figures, how many kinds of integer can be made in all?
How many numbers of integers become multiple of 3?
Noted that 0001, 0122, etc. are not counted as the integers of 4 figures.
When taking four cards out of these cards and making the integer of 4 figures, how many kinds of integer can be made in all?
How many numbers of integers become multiple of 3?
Noted that 0001, 0122, etc. are not counted as the integers of 4 figures.
