Amara wants to find an estimate for the number of ladybirds in a greenhouse.
She catches 80 ladybirds and marks their shells with a small dot of paint. These ladybirds are then released back into the greenhouse.
Two days later, she catches a sample of 120 ladybirds.
Amara finds that 20 of these ladybirds have paint on their shells.
Work out an estimate for the number of ladybirds in the greenhouse.
Write down an assumption you have made.
Practise Edexcel GCSE Maths Capture Recapture with exam-style questions for Foundation and Higher tier. 20 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.