Please answer these?!

Question:

Please answer these?

1) A pharmist wishes to prepare 150 ml of a 20% alchol solution. She has a 30% solution and a 15% solution in her stock. How much of each should be used in forming the desired mixture?"

Answers:

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150 ml at 20% contains 30 ml of alcohol so:

50ml at 30% = 15ml of alcohol
+
100ml at 15% = 15ml of alcohol
=
150ml @ 20%

Hope this helps

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DO YOUR OWN HOMEWORK!!!!!!!

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Yeah, do your own homework or post this in homework help. Besides, this isn't even a food question!

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