Higher November 2020 Paper 3 Q11
11 A spinner can land on red, blue or green.
After 350 spins
relative frequency of red = 0.18
relative frequency of blue = 0.62
Work out the number of times the spinner landed on green. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(1 - 0.18 - 0.62\) or 0.2 | M1 | oe |
| their \(0.2 \times 350\) | M1dep | oe |
| 70 | A1 | |
| Alternative method 2 | ||
| \(0.18 \times 350\) or 63 or \(0.62 \times 350\) or 217 or \(0.8 \times 350\) or 280 | M1 | oe |
| \(350 -\) their \(63 -\) their 217 or \(350 - 280\) | M1dep | oe |
| 70 | A1 | |
Additional guidance
| \(\dfrac{70}{350}\) on answer line | M1M1A0 |
| 0.8 | M0M0A0 |