Foundation November 2022 Paper 3 Q28
28 There are 30 women and 20 men at a gym.
The mean height of all 50 people is 167.6 cm
The mean height of the 20 men is 182 cm
Work out the mean height of the 30 women. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| 158 | P1 | for a first step in the process eg \(50 \times 167.6\ (=8380)\) or \(20 \times 182\ (=3640)\) |
| P1 | for a complete process eg \((50 \times 167.6 - 20 \times 182) \div 30\) or \(\dfrac{8380 - 3640}{30}\) or \(4740 \div 30\) | |
| A1 | cao |