Higher January 2023 Paper 2R Q8
8 60 students sat a Mathematics exam.
The mean mark for the 32 students in Class A was 55
The mean mark for the 28 students in Class B was 52
Find the mean mark for all 60 students.
(3)
| Scheme | Marks |
|---|---|
| 55 × 32 (= 1760) or 52 × 28 (= 1456) or 55 × 32 + 52 × 28 (= 3216) | M1 |
| eg \(\dfrac{\text{``}{1760}\text{''} + \text{``}{1456}\text{''}}{32 + 28}\) or \(\dfrac{3216}{60}\) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 53.6 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: for one correct product or method to find the total mark for both classes
M1: for a complete method