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Capture Recapture

Capture Recapture

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Question 20

Sarah wants to estimate the number of grasshoppers in a specific field.

She catches a sample of 60 grasshoppers. She marks each grasshopper with a small spot of non-toxic dye and releases them.

A week later, Sarah catches another sample of 40 grasshoppers from the same field. She finds that 8 of these grasshoppers have been marked with dye.

a.

Work out an estimate for the total number of grasshoppers in the field.

[2]
b.

Write down any assumptions you have made.

[1]
Markscheme

Capture Recapture Questions

  1. GCSE
  2. /Maths
  3. /Capture Recapture

87 exam-style questions on Eduqas GCSE Maths Capture Recapture. Each one has a worked solution and a mark scheme showing where the marks go.

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