Higher January 2020 Paper 1R Q8
8 5 children are playing on a trampoline.
The mean weight of the 5 children is 28 kg.
2 of the children get off the trampoline.
The mean weight of these 2 children is 26.5 kg.
Work out the mean weight of the 3 children who remain on the trampoline.
(3)
| Scheme | Marks |
|---|---|
| 28 × 5 (= 140) OR 26.5 × 2 (= 53) | M1 |
| (28 × 5 − 26.5 × 2) ÷ (5 – 2) | M1 |
| 29 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: or 87
M1: for a complete method