1MA0 Foundation June 2013 Paper 2 Q25
25 Colin, Dave and Emma share some money.
Colin gets \(\dfrac{3}{10}\) of the money.
Emma and Dave share the rest of the money in the ratio 3 : 2
What is Dave’s share of the money? (4)
| Answer | Mark | Notes |
|---|---|---|
| 28% or \(\dfrac{14}{50}\) | 4 | M1 for 100 − 30 (=70) or \(1 - \dfrac{3}{10}\) (\(= \dfrac{7}{10}\)) M1 for ‘+70’ ÷ (3 + 2) (=14) or ‘\(\dfrac{7}{10}\)’ ÷ (3 + 2) (\(= \dfrac{7}{50}\)) M1 for ‘14’ × 2 or \(\dfrac{7}{50} \times 2\) A1 for 28% or \(\dfrac{14}{50}\) oe OR M1 for a correct method to find (100−30)% of any actual sum of money, eg 0.7×500 M1 for ‘350’ ÷ (3 + 2) (=70) M1 for ‘70’ × 2 (=140) A1 for 28% or \(\dfrac{14}{50}\) oe OR M1 for starting with a two numbers in ratio 3:2, eg 21 and 14 M1 for equating sum of their numbers to 100 – 30 (=70), eg ‘21’ + ‘14’ (=35) M1 for scaling sum of their numbers to 100%, eg ‘35’ ÷ 70 × 100 (=50) A1 for 28% or \(\dfrac{14}{50}\) oe [SC award B3 for oe answers expressed in an incorrect form eg \(\dfrac{2.8}{10}\)] |