Higher June 2025 Paper 1 Q7
7 330 students from Year 10 and Year 11 take part in a competition.
- number of students in Year 10 : number of students in Year 11 \(= 1 : 2\)
- 125 students win a medal.
- 73 of the students who win a medal are in Year 11
Complete the frequency tree. [4 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(330 \div (1 + 2)\) or 110 or 220 | M1 | oe |
| 110 in Year 10 and 220 in Year 11 | A1 | |
| 52 in Year 10 Medal and 73 in Year 11 Medal | B1 | |
| Year 10 Medal \(+\) Year 10 No medal \(=\) Year 10 and Year 11 Medal \(+\) Year 11 No medal \(=\) Year 11 | B1ft | ft their values |
Additional guidance
| Diagram takes precedence | |
| If the values are given as probabilities, with the required value as the numerator, withhold the first A mark or B mark | |
 | M1A1B1B1 |