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primary 5 | Maths
| Rate & Ratio
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Got the answer wrong.pls guide step by step with diagram.
Date Posted: 5 years ago
Views: 327
There must have been 120 more males than females when the ratio was 7:3 (because 120 more females than males got inside to make the numbers equal).
So there are 7 units of males at first, 3 units of females at first and 120 more males than females at first.
4 units = 120 people
1 unit = 30 people
10 units = 300 people
So there are 300 people at first.
Since 48 males and 168 females join in,
Final number of people
= 300 + 48 + 168
= 516
So there are 7 units of males at first, 3 units of females at first and 120 more males than females at first.
4 units = 120 people
1 unit = 30 people
10 units = 300 people
So there are 300 people at first.
Since 48 males and 168 females join in,
Final number of people
= 300 + 48 + 168
= 516
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