The table shows results for three potato cylinders left in the same solution.
Table
| Cylinder | Initial mass / g | Final mass / g |
|---|---|---|
| P | 2.00 | 2.20 |
| Q | 4.00 | 4.20 |
| R | 5.00 | 5.50 |
The student calculates the percentage increase for each cylinder and then calculates the mean of these three percentages.
What is this mean, to one decimal place?
8.2%8.2\%8.2%
8.3%8.3\%8.3%
9.0%9.0\%9.0%
10.0%10.0\%10.0%
41 exam-style questions on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one has a worked solution and a mark scheme showing where the marks go.