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1.2 Number, size and scale

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Question 11
F

A tissue sample is divided into 40 equal squares. Cells are counted in four randomly selected squares.

Table

SquareNumber of cells
P14
Q18
R16
S12

A student estimates that the sample contains 2400 cells.

Which statement identifies the error and gives the correct estimate?

[1]
A

The mean was used instead of the total; the estimate should be 600 cells.

B

The total was used instead of the mean; the estimate should be 600 cells.

C

The total was used instead of the mean; the estimate should be 150 cells.

D

The mean was used instead of the total; the estimate should be 150 cells.

Markscheme

1.2 Number, size and scale Questions

  1. GCSE
  2. /Biology
  3. /1.2 Number, size and scale

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.

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