Vinegar

What percentage vinegar we get if we mix 1 if dm³ eight percent vinegar with 1.5 dm³ six percent vinegar?

Correct result:

x =  6.8 %

Solution:

x=1⋅ 8+1.5⋅ 61+1.5=345=6.8%x=\dfrac{ 1 \cdot \ 8+1.5 \cdot \ 6 }{ 1+1.5 }=\dfrac{ 34 }{ 5 }=6.8 \%

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