Higher June 2017 Paper 1 Q7
7 There are 10 boys and 20 girls in a class.
The class has a test.
The mean mark for all the class is 60
The mean mark for the girls is 54
Work out the mean mark for the boys. (3)
| Answer | Mark | Notes |
|---|---|---|
| 72 | P1 | for showing the process of \(30 \times 60\ (=1800)\) or \(20 \times 54\ (=1080)\) |
| P1 | (dep P1) for showing the complete process e.g. \((\text{``}1800\text{''} - \text{``}1080\text{''}) \div 10\) | |
| A1 | concluding the answer is 72 (and not 66) |