A pharmacist is mixing a medication for a patient by combining two solutions with different concentrations of the active ingredient. The patient needs 5 millilitres of the active ingredient in each dose, and he needs 30 doses. Solution A is 5% the active ingredient by volume, and solution B is 20% the active ingredient by volume. If the patient receives a total of 1000 millilitres of medication, how many millilitres of solutions A did the pharmacist use in mixing the medication?
A) 166\( \frac{2}{3} \)
...
A) 166\( \frac{2}{3} \)
...
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