Higher November 2021 Paper 3 Q20
20 \(\dfrac{a}{b} = 3c\)
\(\dfrac{b}{c} = 2\)
Work out the value of \(a\) when \(\quad c = 8\) [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(b = 2c\) or \(b = 16\) or \(\dfrac{a}{b} \times \dfrac{b}{c} = 3c \times 2\) | M1 | oe eg \(\dfrac{a}{2c} = 3c\) or \(\dfrac{a}{16} = 3c\) |
| \((a =)\ 6c^2\) or \(3 \times 8 \times 2 \times 8\) or \(24 \times 16\) or \(6 \times 8^2\) or \(6 \times 64\) | M1dep | oe |
| 384 | A1 |
Additional guidance
| \(\dfrac{b}{8} = 2\) | M0 |
| \(\dfrac{a}{b} = 24\) | M0 |