Permille of alcohol

I have 2 per mille of alcohol in my blood. How many milliliters is it when I have 5 liters of blood?

Correct answer:

a =  10 ml

Step-by-step explanation:

$$\begin{gathered} V_1=5\text{ l } \\ q=2\text{‰}={\displaystyle \frac{2}{1000}}=0.002 \\ {V}_2=V_1\cdot q=5\cdot 0.002={\displaystyle \frac{1}{100}}=0.01\text{ l } \\ a=V_2\to \text{ ml}=V_2\cdot 1000\text{ ml}=0.01\cdot 1000\text{ ml}=10\text{ ml} \end{gathered}$$

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