Drunk and alcohol

One drunk measured 2.7 ‰ of alcohol in the blood, another 1.75 ‰. How many grams of alcohol in the blood do they have if they had 6 kg of blood?

Correct answer:

a =  16.2 g
b =  10.5 g

Step-by-step explanation:

$$\begin{gathered} V=6\text{kg}\to \text{g}=6\cdot 1000\text{g}=6000\text{g} \\ a=\frac{2.7}{1000}\cdot V=\frac{2.7}{1000}\cdot 6000=\frac{81}{5}\text{g}=16.2\text{g} \end{gathered}$$

$b=\frac{1.75}{1000}\cdot V=\frac{1.75}{1000}\cdot 6000=\frac{21}{2}\text{g}=10.5\text{g}$

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