A mixture is made with 45 ounces of a 10% saline solution and ounces of a 70% saline solution. The resulting mixture is a 25% saline solution. What is the value of ?
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Given : A mixture is made with 45 ounces of a 10% saline solution and ? ounces of a 70% saline solution. The resulting mixture is a 25% saline solution.
To Find : What is the value of ?
Solution:
mixture is made with 45 ounces of a 10% saline solution
Salt = (10/100)45 = 4.5 ounces
? = X ounces
X ounces of a 70% saline solution.
=> Salt = (70/100)X = 0.7X ounces
Total Salt = 4.5 + 0.7X ounces
Total Mixture = 45 + X ounces
25% saline
=> (25/100) 45 + X = 4.5 + 0.7X
=> 45 + X = 18 + 2.8X
=> 1.8X = 27
=> X = 15
value of ? = 15 Ounces
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