A plant health worker monitors a fungal infection in a crop of 320 pepper plants.
The table shows the number of plants showing signs of infection during the first 8 days.
| Day | Number of plants showing infection |
|---|---|
| 0 | 6 |
| 4 | 12 |
| 8 | 24 |
The trend continues until day 12. On day 12, every plant showing infection is removed. No other plants are removed.
Calculate the percentage of the pepper plants that are not removed.
Show your working.
133 exam-style questions on AQA GCSE Biology 3.3 Plant disease, covering 3.3.1 Detection and identification of plant diseases and 3.3.2 Plant defence responses. Each one has a worked solution and a mark scheme showing where the marks go.