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Primary 6
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Number and Algebra
Help
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5
Yeo See Yeong
6 years ago
Micheal Lim
Sorry I don't really understand?
6 years ago
Yeo See Yeong
Initially was 7:5 then eventually became 3:4. LCM of "5" & "4" is 20.
Thus, 7:5 can be drawn as 28:20
3:4 can be drawn as 15:20
Hence 28 - 15 = 13u = 26. Therefore u = 2
6 years ago
Micheal Lim
Thanks a lot
6 years ago
Yap Michelle
Hope this can helps to understand better?
6 years ago
Serene Koon
Asked 9 years ago
SG
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Is ans correct? Pls advise.
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3
Yeo See Yeong
6 years ago
Serene Koon
Thanks Yeo See Yeong. Same answer 60 but is my sons' working correct?
6 years ago
Yeo See Yeong
Answer is correct but I am not sure if I understand the model. He had boys initially at 100%+24. A 10% reduction shd result in 90% +21.6. But the model show 90% instead.
6 years ago
Serene Koon
Asked 9 years ago
SG
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Primary 6
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Number and Algebra
Need help on this P6 question. Thanks
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4
Ping Loh
A) 37.5
B) decreased by 16.7%
6 years ago
Yeo See Yeong
6 years ago
Gek Poh
Aiyah...don't understand the answer. .why do we start off by saying that there are 2u in may?
6 years ago
Yeo See Yeong
Question mentioned that unit sold increase by half. So a 2u in May will result in 3u in June. Alternatively, you can use 1u in May but units sold will become 1.5u in June.
To increase the average marks (marks per student) by 3 (i.e. 46-43),
we need to increase the total marks by 12 (i.e. 4+8).
Hence, no. of students
= 12รท3
= 4