There were a total of 96 questions in a school Science test. 7 marks were awarded for each correct answer and 5 marks were deducted for each incorrect answer or incomplete answer. Anna could not complete all the questions in time and left the last 9 questions blank. She scored 300 marks. How many less wrong or incomplete answers than correct answers did she answer?
Correct answers
|
Marks awarded (x7) |
Wrong or incomplete answers |
Marks deducted (x5) |
Difference
|
87 |
609 |
9 |
45 |
564 |
86 |
602 |
10 |
50 |
552 |
Number of questions completed
= 96 - 9
= 87
Big difference
= 564 - 300
= 264
Small Difference
= 564 - 552
= 12
Number of wrong answers
= 264 ÷ 12
= 22
Number of wrong and incomplete answers
= 22 + 9
= 31
Number of correct answers
= 96 - 31
= 65
Number of less wrong or incomplete answers than correct answers
= 65 - 31
= 34
Answer(s): 34