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Help on math challenge1B(c) amc8/mathcounts winter 2017-2018 counting and probability

 
 
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Re: Help on math challenge1B(c) amc8/mathcounts winter 2017-2018 counting and probability
ReynosoDavid - 2018年01月17日 Wednesday 10:01
 

Yes, as long as they add up to $15$, $a$, $b$ and $c$ could have the same value.

 
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