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primary 6 | Maths
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bro anyone help me pls pls pls its due tmr my tuition tcher will kill me pls help me pls SOS
If there are really 45 pupils in both classes, then there would be 30 pupils in classroom A and 15 pupils in classroom B.
Transferring 12 students from classroom B to classroom A results in classroom A having 42 pupils and classroom B having 3 pupils. That's not a ratio 4 : 1.
- classroom A gains 12 pupils
- classroom B loses 12 pupils
Classroom A already has 15 more pupils than classroom B. If you draw the models correctly, the gap will widen to 15 + 12 + 12 = 39 pupils. This is where Haz's workings are flawed.
Now classroom A has 39 more pupils than classroom B. This corresponds to the 3 units difference (from the ratio 4 : 1).
3 units --> 39
1 unit --> 13
5 units --> 65
There are 65 pupils in both classes at first, with 40 pupils in classroom A and 25 pupils in classroom B.
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