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primary 6 | Maths | Ratio
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Yong Kang Jun Jayden
Yong Kang Jun Jayden

primary 6 chevron_right Maths chevron_right Ratio chevron_right Singapore

I got 7/24 ISIT correct

Date Posted: 1 week ago
Views: 40

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3/5 of the class are class are girls, hence:
1 - 3/5 = 2/5 of the class are boys

1/3 of the girls wear glasses:
so the fractiom of the class that are girls AND wear glasses is 1/3 x 3/5 = 1/5

1/4 of the boys wear glasses:
so fraction of class that are boys AND wear glasses is 1/4 x 2/5 = 1/10

So total fraction of class that wear glasses:
1/10 + 1/5 = 1/10 + 2/10 = 3/10

Hence 3/10 of the class wear glasses
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Han Muyuan Alex
Han Muyuan Alex's answer
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