Three examples per-mille

A. Calculate 1.5 ‰ from 4.5 liters of blood. Express the result in milliliters.
B. Calculate three ‰ from € 50,000.
C. The tray they brought breakfast to the landlord's bed is made of an alloy that contains 830 ‰ of silver. How much silver did they use on it if the tray weighed 390 g?

Correct result:

a =  6.75 ml
b =  150
c =  323.7 g

Solution:

V=4.5 l ml=4.5 1000  ml=4500 ml q1=1.5=1.51000=0.0015 a=q1 V=0.0015 4500=274=274 ml=6.75 ml
q2=3=31000=0.003 b=q2 50000=0.003 50000=150 Eur
q3=830=8301000=0.83 m3=390 g c=q3 m3=0.83 390=323710=323710 g=323.7 g



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