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Two solutions of 90% and 97% purity are mixed resulting in 21 litres of mixture of 94 % purity. How much is the quantity of the first solution in the resulting mixture?

Option 1)
$15\: litres$
Option 2)
$12\: litres$
Option 3)
$9\: litres$
Option 4)
$7\: litres$
Option 5)
$6\: litres$

Answers (1)

R rishi.raj

First solution = 3/7 x 21 = 9L

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