bibha wrote:

If 12 ounces of a strong vinegar solution are diluted with 50 ounces of water to form a three-percent vinegar solution, what was the concentration of the original solution?

A. 19.3%

B. 17%

C. 16.67%

D. 15.5%

E. 12.5%

This is a type of question where homogenous solution(Water) is mixed with a mixture

Therefore

concentration is inversely proportional to volume

i.e Concentation(final) X Volume(Final) = Concentration(initial) X volume(initial)

0.3 X 62 = Concentration(initial) X 12

Concentration (initial) = 15.5%

Hence D