Question: A scientist mixes water (containing no salt) with a solution that contains 60% salt. She wants to obtain 250 ounces of a mixture that has

A scientist mixes water (containing no salt) with a solution that contains 60% salt. She wants to obtain 250 ounces of a mixture that has 15% salt. How many ounces of water (containing no salt) and how many ounces of the 60% salt solution should she use?

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