3. A certain medical treatment requires two different ingredients, the medicine to be
mixed into a saline solution, to be administered in a ratio of 3:5 respectively.
(a). A batch of the treatment was made using 8 milligrams of medicine. How many
milligrams of saline was used in this batch and how much of the treatment was made
in total? (3 marks)
(b). A second batch of the treatment was made. This second batch had 112 grams of
the treatment. How many grams of each medicine was used? (3 marks)
(c). The doctor orders you to deliver 6 milligrams of the medicine to a patient. As
stated, the treatment on hand has 3mg per 5mg of saline. How many litres of the
treatment will you have to administer to the patient? (3 marks)