There were a total of 94 questions in a school Science test. 6 marks were awarded for each correct answer and 3 marks were deducted for each incorrect answer or incomplete answer. Mary could not complete all the questions in time and left the last 8 questions blank. She scored 276 marks. How many less wrong or incomplete answers than correct answers did she answer?
Correct answers
|
Marks awarded
(x6) |
Wrong or
incomplete answers |
Marks deducted
(x3) |
Difference
|
| 86 |
516 |
8 |
24 |
492 |
| 85 |
510 |
9 |
27 |
483 |
Number of questions completed
= 94 - 8
= 86
Big difference
= 492 - 276
= 216
Small Difference
= 492 - 483
= 9
Number of wrong answers
= 216 ÷ 9
= 24
Number of wrong and incomplete answers
= 24 + 8
= 32
Number of correct answers
= 94 - 32
= 62
Number of less wrong or incomplete answers than correct answers
= 62 - 32
= 30
Answer(s): 30
