Eliz's answer to Leow Wen Ze's Primary 5 Maths Rate & Ratio Singapore question.
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If you have learnt algebra, you can use that method too! I'm not sure if your teacher has taught you algebra yet; so here's the "Primary School" method. (No pun intended.) Hope this helps! :)
For the below average part, the average of the marks that the 4 students scored is 68 which was below 71, the average for the class. The average of the class increased to 73.
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Drawing models may help you to visualise it better!
For the below average part, the average of the marks that the 4 students scored is 68 which was below 71, the average for the class. The average of the class increased to 73.
---OPTIONAL---
Drawing models may help you to visualise it better!
Date Posted:
5 years ago
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