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primary 5 | Maths
| Whole Numbers
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Date Posted: 5 years ago
Views: 369
For every 7 questions, 2 were answered incorrectly. So the other 5 questions were answered correctly.
Points awarded = 5 x 4 marks for each correct answer - 2 x 2 marks for each wrong answer
= 20 marks - 4 marks
= 16 marks.
So this means for every 7 questions, 16 marks were scored.
Since she scored 128 marks,
128 ÷ 16 = 8
There were 8 sets of 7 questions.
8 x 2 = 16
A total of 16 questions were answered incorrectly.
Points awarded = 5 x 4 marks for each correct answer - 2 x 2 marks for each wrong answer
= 20 marks - 4 marks
= 16 marks.
So this means for every 7 questions, 16 marks were scored.
Since she scored 128 marks,
128 ÷ 16 = 8
There were 8 sets of 7 questions.
8 x 2 = 16
A total of 16 questions were answered incorrectly.
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