4MA0 Higher June 2016 Paper 4R Q9
9 There are 30 apples in a box.
The mean weight of these 30 apples is 120 grams.
There are 10 apples in a bag.
The mean weight of these 10 apples is 95 grams.
Work out the mean weight of the 40 apples.
(3)
| Scheme | Marks |
|---|---|
| 30 × 120 (= 3600) or 10 × 95 (= 950) | M1 |
| (“3600” + “950”) ÷ (30 + 10) (= “4550” ÷ “40”) | M1 |
| 113.75 | A1 |
| (3) |
Notes
M1: 30 × 120 or 10 × 95
M1: a fully correct method to find the mean weight of the 40 apples
A1: accept 113.8, 114 providing M2 scored