4MA0 Higher January 2018 Paper 4R Q4
4 A bag contains only red marbles and green marbles.
The bag contains a total of 400 marbles.
The ratio of the number of red marbles to the number of green marbles is 5 : 3
How many more red marbles are there than green marbles in the bag?
(3)
| Scheme | Marks |
|---|---|
| \(\dfrac{400}{5 + 3}\) or 50 or \(\dfrac{400}{5 + 3} \times 5\) (=250) or \(\dfrac{400}{5 + 3} \times 3\) (=150) | M1 |
| “50” × 2 | M1 |
| 100 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: For \(\dfrac{400}{5 + 3} \times 5\) (=250) and \(\dfrac{400}{5 + 3} \times 3\) (=150)
Alternative Method
| Scheme | Marks |
|---|---|
| M2 | |
| 100 | A1 |
Notes
M2: For \(\dfrac{2}{8} \times 400\)