Teach Genie
Teach it back in your own words, spot gaps, and remember it better.
Question 1
3 marksBhavna has a bag containing a large number of beads.
She wants to find an estimate for the number of beads in the bag.
Bhavna takes a sample of 30 beads from the bag.
She marks each bead with a black cross.
She then puts the beads back in the bag.
Bhavna shakes the bag.
She now takes another sample of 30 beads from the bag.
4 of these beads have been marked with a black cross.
What is capture recapture used to estimate?
Revision notes for AQA GCSE Maths Capture Recapture. Open the guide for explanations and worked examples. Written against the AQA GCSE Maths (8300) specification, so the content matches what's examinable rather than general Maths background.
1 of 5
A wildlife worker marks 30 birds and releases them. Later, a sample of 20 birds contains 5 marked birds. Estimate the total bird population.
