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primary 5 | Maths
| Percentage
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Date Posted: 2 years ago
Views: 452
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Date Posted:
2 years ago
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Date Posted:
2 years ago
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Date Posted:
2 years ago
really helps alot ! thank you so much :]
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Date Posted:
2 years ago
At first-> 35
20% boys 80% girls
100%-> 35
1%-> 0.35
20%-> 0.35×20=7 boys at first
Later-> 35+5=40
25% boys 75% girls
100%-> 40
1%-> 0.4
25->0.4×25=10 boys later
Number of boys joined
----->10-7=3
Ans: 3
20% boys 80% girls
100%-> 35
1%-> 0.35
20%-> 0.35×20=7 boys at first
Later-> 35+5=40
25% boys 75% girls
100%-> 40
1%-> 0.4
25->0.4×25=10 boys later
Number of boys joined
----->10-7=3
Ans: 3
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