Foundation November 2020 Paper 3 Q9
9 500 people started a race.
280 were men and the rest were women.
80% of the men finished the race.
30 women did not finish the race.
Complete the frequency tree. [5 marks]
| Answer | Mark | Comments |
|---|---|---|
| 280 or 30 in correct position | B1 | |
| \(500 - 280\) or 220 | M1 | |
| \(0.8(0) \times\) their 280 or 224 or \(0.2(0) \times\) their 280 or 56 | M1 | oe |
| their 220 − their 30 or 190 or 280 − their 224 or 280 − their 56 or \(0.8(0) \times\) their 280 or 224 and \(0.2(0) \times\) their 280 or 56 | M1 | |
| Fully correct frequency tree | A1 |
Additional guidance
Allow relative frequencies with denominator of 500 for B1 or M marks
Mark the diagram first, values in diagram have priority over working
Correct values may be incorrectly placed for method marks
