Nurse Sam gave the mother of the sick child a 20 oz bottle of liquid medication and told her the child should take 50 mL three times a day. How many total fluid ounces will the child take in one day?

The child will take a total of 1.5 fluid ounces in one day.

NOPE, I don't want you as my pharmacist.

The child will take 50 mL x 3 times/day = 150 mL/day. Convert that to oz.
150 mL/day x (1 oz/29.5735/mL) = 5.0721 U. S, fluid oz per day.