Carlos wants to find an estimate for the number of ants in a colony.
He catches 60 ants from the colony and marks each one with a dye. He then returns the ants to the colony.
A week later, Carlos catches another 60 ants. 8 of these ants are marked with the dye.
Work out an estimate for the number of ants in the colony.
Write down an assumption you have made.
5 exam-style questions on Edexcel GCSE Statistics Capture Recapture. Each one has a worked solution and a mark scheme showing where the marks go.