Foundation November 2019 Paper 1 Q25
25 4 red bricks have a mean weight of 5 kg.
5 blue bricks have a mean weight of 9 kg.
1 green brick has a weight of 6 kg.
Donna says,
“The mean weight of the 10 bricks is less than 7 kg.”
Is Donna correct?
You must show how you get your answer. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| No (supported) | P1 | for process to find total weight of the 4 red bricks, eg. \(5 \times 4\ (= 20)\) or for process to find total weight of the 5 blue bricks, eg. \(9 \times 5\ (= 45)\) |
| P1 | for process to find total weight of all 10 bricks, eg. \(\text{``}20\text{''} + \text{``}45\text{''} + 6\ (= 71)\) | |
| C1 | No with correct supporting evidence Acceptable examples No, it is 7.1 She is wrong, it is 0.1 more No, (the total weight is) 71 not 70 Not acceptable examples Yes .... No, it is 71 |
Additional guidance
May be seen next to statements
20 must be clearly referenced to the red bricks.
\(5 + 9 + 6 = 20\) scores no marks
Candidates working in grams will need to give 7100 and 7000 for example as comparable figures.