1MA0 Higher November 2015 Paper 1 Q13
13 There are 18 packets of sweets and 12 boxes of sweets in a carton.
The mean number of sweets in all the 30 packets and boxes is 14
The mean number of sweets in the 18 packets is 10
Work out the mean number of sweets in the boxes. (3)
| Answer | Mark | Notes |
|---|---|---|
| 20 | 3 | M1 for \(30 \times 14\) (=420) or \(18 \times 10\) (=180) M1 for \(30 \times 14 - 18 \times 10\) or \(\text{``}420\text{''} - \text{``}180\text{''}\) (=240) A1 cao |