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a pharmacist wants to mix two solutions to obtain 350 cc of a solution that has a 14% concentration of a certain medicine. if one solution has a 17% concentration of the medicine and the second has a 7% concentration, how much of each solution should she mix ?

 Sep 19, 2020
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Let the number of cc of 17% concentration needed =S

Then, the number of cc of 7% concentration needed =350 - S

 

0.17S  +  0.07*[350 - S] =0.14 * 350, solve for S 

 

S = 245 cc of 17% concentration

350 - 245 =105 cc 0f 7% concenration.

 Sep 19, 2020

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