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.
Work out an estimate for the total number of grasshoppers in the field.
Write down any assumptions you have made.
Practise OCR GCSE Maths Capture Recapture with exam-style questions for Foundation and Higher tier. 20 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.
