# A pharmacist mixed some 10% saline solution with some 15% saline solution to obtain 100 mL of a 12% saline solution. How much of the 10% saline solution did the pharmacist use in the mixture?

May 18, 2016

60ml

#### Explanation:

If the proportions for 12% salinity are L ml and and M, ml. then

L + M = 100 ml. and 0..10 L + 0.15 M = ( L + M ) 0.12 = 12.

Solving, L = 60 and M = 40..