Tanya wants to estimate the number of termites in a nest On

Tanya wants to estimate the number of termites in a nest. On Monday Tanya catches 80 termites. She puts a mark on each termite. She then puts aU 80 termites back in the nest. On Tuesday Tanya catches 60 termites. 12 of these termites have a mark on them. Work out an estimate for the total number of termites in the nest. You must write down any assumptions you have made.

Solution

she catchest 60 termites and 12 of them are marked. that means 12/60 or 1/5th are marked

I\'m making assumption that no marked termite leaves the nest.

Initially Tanya marked 80 termites then according to 1/5th marked ratio, total termites will be 5 times number of marked termites

hecne total number of termites in the nest =5*80=400