Hi all,
I think this would be a probability question.
We do a random check. 10% smokes marihuana. This test gives the right results in only 90%. One person is tested positive. How big is the chance that he really smoked marihuana?
if there are 8 people in total.
is it also possible to make an assumption if the size of the group is not known?
thanks a lot!
Martine
