Higher June 2019 Paper 1 Q11
11 \(C = b - a\)
\(a = 6\) correct to the nearest integer
\(b = 15\) correct to the nearest 5
Work out the upper bound for the value of \(C\)
Show your working clearly.
(3)
| Scheme | Marks |
|---|---|
| 5.5 or 6.5 or 12.5 or 17.5 | M1 |
| 17.5 – 5.5 | M1 |
| Working required Answer: 12 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: Accept \(6.4\dot{9}\) for 6.5 and \(17.4\dot{9}\) for 17.5
M1: for UB – LB where
\(15 \lt \text{UB} \leqslant 17.5\) and \(5.5 \leqslant \text{LB} \lt 6\)
A1: dep on M2