Question

A scientist mixes water (containing no salt) with a solution that contains 35 % salt. She wants to obtain 245 ounces of a mixture that is 5 % salt. How many ounces of water and how many ounces of the 35 % salt solution should she use?

Answer 1

Explanation:

W = Water

S = 40% salt (if available)

-------------

W + S = 200

w*0 + s*40 =(w+s)*s

40s=5W + 55

5w = 355

w=200 -s

5(200-s) =355

1000 - 5 s =35s

40s =1000

s= 25