Foundation June 2025 Paper 1 Q9
9 Numbered discs are in two boxes.
(a) Work out the ratio
total value of the numbers in Box A : total value of the numbers in Box B
Give your answer in its simplest form. [3 marks]
(b) One disc is picked at random from Box A.
Write down the probability that the number on the disc is greater than 6 [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| \(2 + 2 + 3 + 4 + 9\) or 20 or \(1 + 1 + 1 + 2 + 3 + 4 + 4 + 9\) or 25 | M1 | oe |
| 20 : 25 | A1 | oe |
| 4 : 5 or 0.8 : 1 or 1 : 1.25 | A1ft | ft their ratio written in its simplest form with M1 awarded if it can be simplified SC2 5 : 4 |
Additional guidance
| SC2 is for correct ratio reversed | |
| Condone any ratio simplified to unitary form, with M1 awarded, for A1ft eg1 20 : 19 answer \(1 : \dfrac{19}{20}\) or \(\dfrac{20}{19} : 1\) eg2 20 : 19 | M1A0A1ft M1A0A0ft |
| 20 : 15 simplified to 4 : 3 | M1A0A1ft |
| Answer | Mark | Comments |
|---|---|---|
| \(\dfrac{1}{5}\) | B1 | oe fraction, decimal or percentage |
Additional guidance
| Ignore simplification or conversion attempts after correct probability seen | |
| Ignore use of probability words | |
| 1 : 5 or 1 in 5 (chance) | B0 |