A student counts cells in five equal areas chosen at random from a tissue sample.
Table
| Area | Number of cells |
|---|---|
| P | 18 |
| Q | 22 |
| R | 19 |
| S | 21 |
| T | 20 |
The whole sample has an area 24 times greater than one counted area.
Which is the best estimate of the number of cells in the whole sample?
480 cells
100 cells
240 cells
2400 cells
48 exam-style questions on Edexcel GCSE Biology 1.2 Number, size and scale, covering 1.2.1 Number, size and scale with estimations and 1.2.2 Quantitative units in relation to cells. Each one has a worked solution and a mark scheme showing where the marks go.