Higher January 2019 Paper 1R Q11
11 There are 12 boys and 8 girls in a class.
The boys and the girls have some coins.
The mean number of coins that the boys have is 5.5
The girls have a total of 18 coins.
Work out the mean number of coins the 20 children have.
(3)
| Scheme | Marks |
|---|---|
| 12 × 5.5 (= 66) | M1 |
| \(\dfrac{\text{``}{66}\text{''} + 18}{20}\) | M1 |
| 4.2 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: for a complete method