Question 1199611
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The kerosene amount in the mixture is  0.15*5 + 0.1*8 = 1.55 liters.


The total volume of the liquid mixture is  5 + 8 = 13 liters.


The concentration of the kerosene in the mixture is  {{{(1.55/13)*100}}} = 11.923% (rounded).    <U>ANSWER</U>
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Solved.