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primary 5 | Maths
| Rate & Ratio
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Date Posted: 3 years ago
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Ratio of men to boys to all the males
= 3 : 1 : 4
Make the units the same for males for both ratios.
Common multiple of 4 and 5 is 20
Males : Females
= 5 : 3
= 20 : 12 (after multiplying by 4)
Ratio of men to boys to all the males
= 3 : 1 : 4
= 15 : 5 : 20 (after multiplying by 5)
Make the units the same for females for both ratios.
Ratio of women to girls to all the females
= 2 : 1 : 3
= 8 : 4 : 12
= 3 : 1 : 4
Make the units the same for males for both ratios.
Common multiple of 4 and 5 is 20
Males : Females
= 5 : 3
= 20 : 12 (after multiplying by 4)
Ratio of men to boys to all the males
= 3 : 1 : 4
= 15 : 5 : 20 (after multiplying by 5)
Make the units the same for females for both ratios.
Ratio of women to girls to all the females
= 2 : 1 : 3
= 8 : 4 : 12
Difference in boys and girls
= 5 units - 4 units
= 1 unit
So 1 unit = 18
Total participants = all females + all males
= 12 units + 20 units
= 32 units
= 32 × 18
= 576
= 5 units - 4 units
= 1 unit
So 1 unit = 18
Total participants = all females + all males
= 12 units + 20 units
= 32 units
= 32 × 18
= 576
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