Runners

Thirty chocolates are prepared and distributed in the ratio of 3:2:1 for three runners (in first to third place).

How much chocolate will get everyone?

Correct answer:

a =  15
b =  10
c =  5

Step-by-step explanation:

$a=30\cdot 3/(3+2+1)=15$

$b=30\cdot 2/(3+2+1)=10$

$c=30\cdot 1/(3+2+1)=5$

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