AMC / AIME · Stars and Bars · Easy
Stars and Bars: How many triples of nonnegative integers sum to math?
Integer solutions to linear equations.
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How many triples of nonnegative integers sum to ?
Hint and answer
Concept to use
Nonnegative: $\binom{n+k-1}{k-1}$.
Hint
.
Answer
66
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