alleryMix x L of 30% juice with 10 L of 10% juice. For a final concentration strictly between 20% and 25%, x is:
A10 ≤ x ≤ 30
B5 < x < 15
C20 < x < 30
D10 < x < 30
Answer & Solution
Correct answer: D. 10 < x < 30
The bounds on (1 + 0.30x)/(10 + x) give x > 10 and x < 30.
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