QMI1500
Elementary Quantitative Methods
Department of Decision Sciences
Exam Paper 1 May/June 2017
Question 1
The cost of fish has increased in the ratio of 9 : 7. If the original cost was R5.60 per kg, what is the
new price?
[1] R4.35
[2] R7.20
[3] R50.40
[4] R39.50
Answer:
The original price is R5.60, it increased in the ratio of 9 : 7.
The new price is:
9
𝑅5.60 × 7
= 𝑅7.20
Question 2
A nurse has two solutions that contain different concentrations of a certain medication. One is a
12.5% concentration and the other is a 5% concentration. How many millilitres (ml) of each should
she mix to obtain 20ml of an 8% concentration?
[1] 4 ml at 12.5% and 16 ml at 5%.
Elementary Quantitative Methods
Department of Decision Sciences
Exam Paper 1 May/June 2017
Question 1
The cost of fish has increased in the ratio of 9 : 7. If the original cost was R5.60 per kg, what is the
new price?
[1] R4.35
[2] R7.20
[3] R50.40
[4] R39.50
Answer:
The original price is R5.60, it increased in the ratio of 9 : 7.
The new price is:
9
𝑅5.60 × 7
= 𝑅7.20
Question 2
A nurse has two solutions that contain different concentrations of a certain medication. One is a
12.5% concentration and the other is a 5% concentration. How many millilitres (ml) of each should
she mix to obtain 20ml of an 8% concentration?
[1] 4 ml at 12.5% and 16 ml at 5%.
