There were a total of 96 questions in a school Science test. 9 marks were awarded for each correct answer and 5 marks were deducted for each incorrect answer or incomplete answer. Eva could not complete all the questions in time and left the last 5 questions blank. She scored 570 marks. How many less wrong or incomplete answers than correct answers did she answer?
Correct answers
|
Marks awarded
(x9) |
Wrong or
incomplete answers |
Marks deducted
(x5) |
Difference
|
| 91 |
819 |
5 |
25 |
794 |
| 90 |
810 |
6 |
30 |
780 |
Number of questions completed
= 96 - 5
= 91
Big difference
= 794 - 570
= 224
Small Difference
= 794 - 780
= 14
Number of wrong answers
= 224 ÷ 14
= 16
Number of wrong and incomplete answers
= 16 + 5
= 21
Number of correct answers
= 96 - 21
= 75
Number of less wrong or incomplete answers than correct answers
= 75 - 21
= 54
Answer(s): 54
