There were a total of 74 questions in a school Maths test. 6 marks were awarded for each correct answer and 3 marks were deducted for each incorrect answer or incomplete answer. Lynn could not complete all the questions in time and left the last 6 questions blank. She scored 183 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
|
68 |
408 |
6 |
18 |
390 |
67 |
402 |
7 |
21 |
381 |
Number of questions completed
= 74 - 6
= 68
Big difference
= 390 - 183
= 207
Small Difference
= 390 - 381
= 9
Number of wrong answers
= 207 ÷ 9
= 23
Number of wrong and incomplete answers
= 23 + 6
= 29
Number of correct answers
= 74 - 29
= 45
Number of less wrong or incomplete answers than correct answers
= 45 - 29
= 16
Answer(s): 16