There were a total of 92 questions in a school Science test. 10 marks were awarded for each correct answer and 8 marks were deducted for each incorrect answer or incomplete answer. Opal could not complete all the questions in time and left the last 9 questions blank. She scored 524 marks. How many less wrong or incomplete answers than correct answers did she answer?
Correct answers
|
Marks awarded (x10) |
Wrong or incomplete answers |
Marks deducted (x8) |
Difference
|
83 |
830 |
9 |
72 |
758 |
82 |
820 |
10 |
80 |
740 |
Number of questions completed
= 92 - 9
= 83
Big difference
= 758 - 524
= 234
Small Difference
= 758 - 740
= 18
Number of wrong answers
= 234 ÷ 18
= 13
Number of wrong and incomplete answers
= 13 + 9
= 22
Number of correct answers
= 92 - 22
= 70
Number of less wrong or incomplete answers than correct answers
= 70 - 22
= 48
Answer(s): 48