A researcher measures oxygen production by three samples of duckweed kept under the same conditions.
For each sample, the researcher records the time taken to produce 6.0 cm3 of oxygen.
| Sample | Time taken in minutes |
|---|---|
| P | 12.0 |
| Q | 10.0 |
| R | 8.0 |
Calculate the mean of the three rates of oxygen production.
Give your answer to two decimal places.
87 exam-style questions on Edexcel GCSE Biology 6.1 Photosynthesis, covering 6.1.1 Photosynthetic organisms as producers, 6.1.2a Limiting factors on the rate of photosynthesis, 6.1.2b Interactions of limiting factors on photosynthesis, and 6.1.3 Inverse square law and light intensity. Each one has a worked solution and a mark scheme showing where the marks go.