Question

A scientist mixes water (containing no salt) with a solution that contains 30% salt. She wants to obtain 150 ounces of a mixture that is 15% salt. How many ounces of water and how many ounces of the 30% salt solution should she use?

Answer 1

The scientist should mix 75 ounces of water with 75 ounces of the 30% salt solution to obtain 150 ounces of a mixture that is 15% salt.