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primary 6 | Maths
| Ratio
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Date Posted: 5 years ago
Views: 307
6A
g : b = 3 : 4
g: 3u
b: 4u
6B
g : b = 3 : 2
b: 3u
g: 9u/2
6A:
total = 3u + 4u = 7u (multiple of 7)
between 40 and 50,
so 42 or 49
u = 6 or 7
(has to be even no.)
so u = 6
6B:
3u +9u/2 = 15u/2
15x6/2 = 45
no. of pupils in 6B is 45
g : b = 3 : 4
g: 3u
b: 4u
6B
g : b = 3 : 2
b: 3u
g: 9u/2
6A:
total = 3u + 4u = 7u (multiple of 7)
between 40 and 50,
so 42 or 49
u = 6 or 7
(has to be even no.)
so u = 6
6B:
3u +9u/2 = 15u/2
15x6/2 = 45
no. of pupils in 6B is 45
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