# Counting starts, 1-2-3 Go....

**Discrete Mathematics**Level 3

How many seven-digit integers with digit sum 10 can be formed using the digits 1, 2, and/or 3?

**Note**: Not all of the digits 1, 2, 3 must appear in the integer.

How many seven-digit integers with digit sum 10 can be formed using the digits 1, 2, and/or 3?

**Note**: Not all of the digits 1, 2, 3 must appear in the integer.

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