Foundation June 2018 Paper 1 Q14
14 Gavin, Harry and Isabel each earn the same monthly salary.
Each month,
Gavin saves 28% of his salary and spends the rest of his salary
Harry spends \(\dfrac{3}{4}\) of his salary and saves the rest of his salary
the amount of salary Isabel saves : the amount of salary she spends = 3 : 7
Work out who saves the most of their salary each month.
You must show how you get your answer. (4)
| Answer | Mark | Mark scheme |
|---|---|---|
| Isabel (supported) | P1 | for process to work with \(\dfrac{3}{4}\) eg \(1 - \dfrac{3}{4} \left(= \dfrac{1}{4}\right)\) oe, eg 25% or \(\dfrac{25}{100}\) or \(\dfrac{3}{4}\) = 75% or \(\dfrac{75}{100}\) or value of salary (say 1000) \(\times\ 3 \div 4\ (= 750)\) |
| P1 | for process to work with ratio 3 : 7 eg \(\dfrac{3}{3+7}\) oe or \(\dfrac{7}{3+7}\) oe or value of salary (say 1000) \(\div\ (3+7)\ (= 100)\) | |
| A1 | for (28(%)), 25(%) and 30(%) or 72(%), 75(%), 70(%) or 0.28, 0.25, 0.3 or for using value of salary (say 1000) giving 280, 250, 300 or 720, 750, 700 | |
| C1 | (dep P2) for Isabel or ft their comparative values |
Additional guidance
“Isabel” alone without supported evidence, gets 0 marks.