Solve the problem.A chemist needs 140 milliliters of a 74% solution but has only 50% and 78% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.

Question

A. 20 mL of 50%; 120 mL of 78%
B. 30 mL of 50%; 110 mL of 78%
C. 110 mL of 50%; 30 mL of 78%
D. 120 mL of 50%; 20 mL of 78%

Answer 1

Answer: A