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primary 6 | Maths
| Percentage
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May I know how to for equation? Tks
Date Posted: 4 years ago
Views: 556
Group 1 has a surplus of 20 boys
Group 2 has a surplus of 12 girls.
Overall, there are 8 more boys than girls.
45% of the people are girls. Let total = 100 units.
45 units are girls, 55 units are boys.
There are 10 units of boys more than girls, which correspond to 8 boys more than girls.
10 units = 8 people
5 units = 4 people
55 units = 44 people
So there are 44 boys in total.
Group 2 has a surplus of 12 girls.
Overall, there are 8 more boys than girls.
45% of the people are girls. Let total = 100 units.
45 units are girls, 55 units are boys.
There are 10 units of boys more than girls, which correspond to 8 boys more than girls.
10 units = 8 people
5 units = 4 people
55 units = 44 people
So there are 44 boys in total.
So simple, yet I do not know. Tks a lot
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