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Question
primary 5 | Maths
| Rate & Ratio
One Answer Below
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A primary 5 maths question..
Date Posted: 2 years ago
Views: 630
You can use guess and check...
Here, I will show you assumption method.
Assumed all are answer correctly,
Total mark = 38 × 5 = 190
Mark extra = 190 - 86 = 104
Now, if he answer wrongly, minus 3 marks. So total deducted will be
= 3 + 5 (which if correct answered)
= 8
Therefore, number of answer wrongly
=104 ÷ 8
= 13.
Here, I will show you assumption method.
Assumed all are answer correctly,
Total mark = 38 × 5 = 190
Mark extra = 190 - 86 = 104
Now, if he answer wrongly, minus 3 marks. So total deducted will be
= 3 + 5 (which if correct answered)
= 8
Therefore, number of answer wrongly
=104 ÷ 8
= 13.
See 1 Answer
Assumed all are answer correctly,
Total mark = 38 × 5 = 190
Mark extra = 190 - 86 = 104
Now, if he answer wrongly, minus 3 marks. So total deducted will be
= 3 + 5 (which if correct answered)
= 8
Therefore, number of answer wrongly
=104 ÷ 8
= 13.
Total mark = 38 × 5 = 190
Mark extra = 190 - 86 = 104
Now, if he answer wrongly, minus 3 marks. So total deducted will be
= 3 + 5 (which if correct answered)
= 8
Therefore, number of answer wrongly
=104 ÷ 8
= 13.
Really feeling very thankful for having such nice people willing to help. Thanks..
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