Foundation November 2017 Paper 1 Q15
15 There are only red buttons, yellow buttons and orange buttons in a jar.
The number of red buttons, the number of yellow buttons and the number of orange buttons are in the ratio 7 : 4 : 9
Work out what percentage of the buttons in the jar are orange. (2)
| Answer | Mark | Notes |
|---|---|---|
| 45 | M1 | for a correct first step eg \(\dfrac{9}{7+4+9}\ \left(= \dfrac{9}{20}\right)\) or \(\dfrac{100}{7+4+9}\ (= 5)\) or a full method for one of the other colours |
| A1 | cao |