Problema Solution
A 500 ml drink contains 20% juice. It was drained and replaced with a certain amount containing 40% juice. If the resulting mix has 24% juice, what was the amount that was drained and replaced?
Answer provided by our tutors
let x represent the amount that was drained and replaced
0.20(500 - x) + 0.40x = 0.24*500
by solving we find
x = 100 ml
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100 ml of the juice was drained and replaced.