Joshua Chan's answer to Byye's Primary 5 Maths Rate & Ratio Singapore question.
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Think of the ratios as units. 3:5, so total of 8 units. Then take the total number divided by 8 to find one unit. The difference between swimmers and non swimmers is 2 units. So find how many 2 units are. Hope it helps!
Date Posted:
3 years ago
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