4MA0 Foundation January 2015 Paper 1R Q10
10 In a school, there are 320 girls and 500 boys.
(a) Write down the ratio of the number of girls to the number of boys.
Give your ratio in its simplest form. (2)
Give your ratio in its simplest form. (2)
In a different school, there is a total of 640 children.
In this school, the ratio of the number of girls to the number of boys is 7 : 9
(b) How many boys are there in this school? (2)
| Scheme | Marks |
|---|---|
| 320 : 500 | M1 |
| 16 : 25 | A1 |
| (2) |
Notes
M1: or any correct unsimplified ratio
A1: SC If M0, award B1 for 25 : 16
| Scheme | Marks |
|---|---|
| 640 ÷ (7 + 9) × 9 or 40 × 9 | M1 |
| 360 | A1 |
| (2) | |
| (4 marks) |
Notes
A1: SCB1 for 280