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Capture Recapture

Capture Recapture

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Question 9

Sian wants to estimate the number of birds in a woodland area. She catches 60 birds, attaches a ring to their leg and releases them. Later, she catches a sample of 45 birds and finds that 15 of them have rings.

a.

Calculate an estimate for the total number of birds in the woodland.

[2]
b.

Write down any assumptions you have made.

[1]
Markscheme

Capture Recapture Questions

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

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

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