Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 6 | Maths
| Ratio
One Answer Below
Anyone can contribute an answer, even non-tutors.
I got 7/24 ISIT correct
Date Posted: 1 year ago
Views: 393
See 1 Answer
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
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
360 Tutoring Program