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primary 5 | Maths | Whole Numbers
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Azfer
Azfer

primary 5 chevron_right Maths chevron_right Whole Numbers chevron_right Singapore

Hi. Pls help and explain step by step to me. Thanks

Date Posted: 3 years ago
Views: 216

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Male is 75kg
Female is 55kg

Average is 68kg

Male is 75-68= 7 kg more than average
Female is 68-55= 13kg less than the average

Male more weight is equal to female less weight


Males. Females
7kg 7kg + 7kg - 1kg

Such that

Males. Females
One unit Two units -1/7 unit

Add together should be 200 people
(3-1/7) units is 200

Each unit is 200/(3-1/7) = 70 people per unit

Since males is one unit, males is 70 people
Females is 130 people
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Kahwai
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