During one test, points were awarded for questions answered as shown.
|
Points per question |
Correct |
8 |
Wrong |
- 3 |
Missed |
- 1 |
The ratio of the questions correctly to questions answered wrongly to questions that were missed out was 10 : 3 : 2. If Tiffany was awarded 552 points, how many questions are there in all?
|
Correct |
Wrong |
Missed |
Number |
10 u |
3 u |
2 u |
Value |
8 |
- 3 |
- 1 |
Total value |
80 u |
9 u |
2 u |
Total score that Tiffany was awarded
= 80 u - 9 u - 2 u
= 69 u
69 u = 552
1 u = 552 ÷ 69 = 8
Total number of questions
= 10 u + 3 u + 2 u
= 15 u
= 15 x 10
= 150
Answer(s): 150