Skip to content

Course home

Capture Recapture

Capture Recapture

EasyMediumHard
123456789
Question 9

Beth wants to estimate the number of frogs in a lake.
She catches a sample of 80 frogs, marks them and puts them back in the lake.
Later that day, in a second sample of 80 frogs, she finds that 10 of them are marked.

a.

Work out the fraction of frogs in the second sample that are marked. Give your answer in its simplest form.

[1]
b.

Hence work out an estimate for the number of frogs in the lake.

[1]
c.

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.

Question bank